73072631 has 2 divisors, whose sum is σ = 73072632. Its totient is φ = 73072630.

The previous prime is 73072627. The next prime is 73072661. The reversal of 73072631 is 13627037.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73072631 - 2² = 73072627 is a prime.

It is a super-2 number, since 2×73072631² = 10679218802524322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73072594 and 73072603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73072661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36536315 + 36536316.

It is an arithmetic number, because the mean of its divisors is an integer number (36536316).

Almost surely, 2^73072631 is an apocalyptic number.

73072631 is a deficient number, since it is larger than the sum of its proper divisors (1).

73072631 is an equidigital number, since it uses as much as digits as its factorization.

73072631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 73072631 is about 8548.2530963934. The cubic root of 73072631 is about 418.0724808112.

Adding to 73072631 its reverse (13627037), we get a palindrome (86699668).

The spelling of 73072631 in words is "seventy-three million, seventy-two thousand, six hundred thirty-one".