113403537 has 16 divisors (see below), whose sum is σ = 180929280. Its totient is φ = 69786576.

The previous prime is 113403509. The next prime is 113403551. The reversal of 113403537 is 735304311.

It is not a de Polignac number, because 113403537 - 2¹⁵ = 113370769 is a prime.

It is a super-2 number, since 2×113403537² = 25720724408220738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 113403537.

It is not an unprimeable number, because it can be changed into a prime (113403337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161193 + ... + 161894.

It is an arithmetic number, because the mean of its divisors is an integer number (11308080).

Almost surely, 2^113403537 is an apocalyptic number.

It is an amenable number.

113403537 is a deficient number, since it is larger than the sum of its proper divisors (67525743).

113403537 is a wasteful number, since it uses less digits than its factorization.

113403537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323109 (or 323103 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 113403537 is about 10649.1096810954. The cubic root of 113403537 is about 484.0336261158.

Adding to 113403537 its reverse (735304311), we get a palindrome (848707848).

The spelling of 113403537 in words is "one hundred thirteen million, four hundred three thousand, five hundred thirty-seven".