1371897494 has 32 divisors (see below), whose sum is σ = 2284454016. Its totient is φ = 612659520.

The previous prime is 1371897473. The next prime is 1371897497. The reversal of 1371897494 is 4947981731.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371897497) 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, 687362 + ... + 689354.

It is an arithmetic number, because the mean of its divisors is an integer number (71389188).

Almost surely, 2^1371897494 is an apocalyptic number.

1371897494 is a deficient number, since it is larger than the sum of its proper divisors (912556522).

1371897494 is a wasteful number, since it uses less digits than its factorization.

1371897494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540.

The product of its digits is 1524096, while the sum is 53.

The square root of 1371897494 is about 37039.1346281200. The cubic root of 1371897494 is about 1111.1530625368.

The spelling of 1371897494 in words is "one billion, three hundred seventy-one million, eight hundred ninety-seven thousand, four hundred ninety-four".