1373191864 has 64 divisors (see below), whose sum is σ = 3130617600. Its totient is φ = 556531200.

The previous prime is 1373191861. The next prime is 1373191871. The reversal of 1373191864 is 4681913731.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1373191864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373191861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4269 + ... + 52579.

It is an arithmetic number, because the mean of its divisors is an integer number (48915900).

Almost surely, 2^1373191864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1373191864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565308800).

1373191864 is an abundant number, since it is smaller than the sum of its proper divisors (1757425736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1373191864 is a wasteful number, since it uses less digits than its factorization.

1373191864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48364 (or 48360 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 1373191864 is about 37056.6035140837. The cubic root of 1373191864 is about 1111.5024062039.

The spelling of 1373191864 in words is "one billion, three hundred seventy-three million, one hundred ninety-one thousand, eight hundred sixty-four".