73742531 has 4 divisors (see below), whose sum is σ = 76948752. Its totient is φ = 70536312.

The previous prime is 73742527. The next prime is 73742561. The reversal of 73742531 is 13524737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13524737 = 61 ⋅221717.

It is a cyclic number.

It is not a de Polignac number, because 73742531 - 2² = 73742527 is a prime.

It is a super-2 number, since 2×73742531² = 10875921756571922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73742561) 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, 1603076 + ... + 1603121.

It is an arithmetic number, because the mean of its divisors is an integer number (19237188).

Almost surely, 2^73742531 is an apocalyptic number.

73742531 is a deficient number, since it is larger than the sum of its proper divisors (3206221).

73742531 is a wasteful number, since it uses less digits than its factorization.

73742531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206220.

The product of its digits is 17640, while the sum is 32.

The square root of 73742531 is about 8587.3471456556. The cubic root of 73742531 is about 419.3461690020.

The spelling of 73742531 in words is "seventy-three million, seven hundred forty-two thousand, five hundred thirty-one".