73618631 has 4 divisors (see below), whose sum is σ = 73667064. Its totient is φ = 73570200.

The previous prime is 73618627. The next prime is 73618651. The reversal of 73618631 is 13681637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13681637 = 83 ⋅164839.

It is a cyclic number.

It is not a de Polignac number, because 73618631 - 2² = 73618627 is a prime.

It is a super-2 number, since 2×73618631² = 10839405660628322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73618591 and 73618600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73618651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21860 + ... + 25001.

It is an arithmetic number, because the mean of its divisors is an integer number (18416766).

Almost surely, 2^73618631 is an apocalyptic number.

73618631 is a deficient number, since it is larger than the sum of its proper divisors (48433).

73618631 is a wasteful number, since it uses less digits than its factorization.

73618631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48432.

The product of its digits is 18144, while the sum is 35.

The square root of 73618631 is about 8580.1300106700. The cubic root of 73618631 is about 419.1111797057. Note that the first 4 decimals are identical.

The spelling of 73618631 in words is "seventy-three million, six hundred eighteen thousand, six hundred thirty-one".