1357991523 has 24 divisors (see below), whose sum is σ = 2243045376. Its totient is φ = 775551600.

The previous prime is 1357991521. The next prime is 1357991533. The reversal of 1357991523 is 3251997531.

1357991523 is a `hidden beast` number, since 1 + 35 + 7 + 9 + 91 + 523 = 666.

It is not a de Polignac number, because 1357991523 - 2¹ = 1357991521 is a prime.

It is a super-3 number, since 3×1357991523³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1357991521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127888 + ... + 138098.

It is an arithmetic number, because the mean of its divisors is an integer number (93460224).

Almost surely, 2^1357991523 is an apocalyptic number.

1357991523 is a deficient number, since it is larger than the sum of its proper divisors (885053853).

1357991523 is a wasteful number, since it uses less digits than its factorization.

1357991523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12335 (or 12332 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 1357991523 is about 36850.9365281264. The cubic root of 1357991523 is about 1107.3859769456.

The spelling of 1357991523 in words is "one billion, three hundred fifty-seven million, nine hundred ninety-one thousand, five hundred twenty-three".