1578947913 has 48 divisors (see below), whose sum is σ = 2464929792. Its totient is φ = 970368000.

The previous prime is 1578947897. The next prime is 1578947969. The reversal of 1578947913 is 3197498751.

It is a happy number.

1578947913 is a `hidden beast` number, since 157 + 8 + 9 + 479 + 13 = 666.

It is not a de Polignac number, because 1578947913 - 2⁴ = 1578947897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1578947913.

It is not an unprimeable number, because it can be changed into a prime (1578947113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2074453 + ... + 2075213.

It is an arithmetic number, because the mean of its divisors is an integer number (51352704).

Almost surely, 2^1578947913 is an apocalyptic number.

It is an amenable number.

1578947913 is a deficient number, since it is larger than the sum of its proper divisors (885981879).

1578947913 is a wasteful number, since it uses less digits than its factorization.

1578947913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046 (or 1043 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 1578947913 is about 39735.9775644189. The cubic root of 1578947913 is about 1164.4547081847.

The spelling of 1578947913 in words is "one billion, five hundred seventy-eight million, nine hundred forty-seven thousand, nine hundred thirteen".