137625643 has 4 divisors (see below), whose sum is σ = 140982408. Its totient is φ = 134268880.

The previous prime is 137625599. The next prime is 137625661. The reversal of 137625643 is 346526731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137625643 - 2¹³ = 137617451 is a prime.

It is a super-2 number, since 2×137625643² = 37881635222326898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137625143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1678321 + ... + 1678402.

It is an arithmetic number, because the mean of its divisors is an integer number (35245602).

Almost surely, 2^137625643 is an apocalyptic number.

137625643 is a deficient number, since it is larger than the sum of its proper divisors (3356765).

137625643 is an equidigital number, since it uses as much as digits as its factorization.

137625643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356764.

The product of its digits is 90720, while the sum is 37.

The square root of 137625643 is about 11731.3956117761. The cubic root of 137625643 is about 516.2972204988.

The spelling of 137625643 in words is "one hundred thirty-seven million, six hundred twenty-five thousand, six hundred forty-three".