1913147964 has 144 divisors (see below), whose sum is σ = 6213866400. Its totient is φ = 504548352.

The previous prime is 1913147933. The next prime is 1913147987. The reversal of 1913147964 is 4697413191.

It is a happy number.

1913147964 is a `hidden beast` number, since 1 + 91 + 31 + 479 + 64 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54892 + ... + 82700.

It is an arithmetic number, because the mean of its divisors is an integer number (43151850).

Almost surely, 2^1913147964 is an apocalyptic number.

1913147964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1913147964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3106933200).

1913147964 is an abundant number, since it is smaller than the sum of its proper divisors (4300718436).

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

1913147964 is a wasteful number, since it uses less digits than its factorization.

1913147964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27849 (or 27834 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1913147964 is about 43739.5469112335. The cubic root of 1913147964 is about 1241.4127074703.

The spelling of 1913147964 in words is "one billion, nine hundred thirteen million, one hundred forty-seven thousand, nine hundred sixty-four".