72349631 has 2 divisors, whose sum is σ = 72349632. Its totient is φ = 72349630.

The previous prime is 72349621. The next prime is 72349657. The reversal of 72349631 is 13694327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72349631 - 2¹⁰ = 72348607 is a prime.

It is a super-2 number, since 2×72349631² = 10468938211672322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72349591 and 72349600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72349601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36174815 + 36174816.

It is an arithmetic number, because the mean of its divisors is an integer number (36174816).

Almost surely, 2^72349631 is an apocalyptic number.

72349631 is a deficient number, since it is larger than the sum of its proper divisors (1).

72349631 is an equidigital number, since it uses as much as digits as its factorization.

72349631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 35.

The square root of 72349631 is about 8505.8586280281. The cubic root of 72349631 is about 416.6890680934.

The spelling of 72349631 in words is "seventy-two million, three hundred forty-nine thousand, six hundred thirty-one".