73626431 has 2 divisors, whose sum is σ = 73626432. Its totient is φ = 73626430.

The previous prime is 73626373. The next prime is 73626433. The reversal of 73626431 is 13462637.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73626431 is a prime.

It is a super-2 number, since 2×73626431² = 10841702683595522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 73626433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73626433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36813215 + 36813216.

It is an arithmetic number, because the mean of its divisors is an integer number (36813216).

Almost surely, 2^73626431 is an apocalyptic number.

73626431 is a deficient number, since it is larger than the sum of its proper divisors (1).

73626431 is an equidigital number, since it uses as much as digits as its factorization.

73626431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

The square root of 73626431 is about 8580.5845371979. The cubic root of 73626431 is about 419.1259809940.

The spelling of 73626431 in words is "seventy-three million, six hundred twenty-six thousand, four hundred thirty-one".