72426631 has 2 divisors, whose sum is σ = 72426632. Its totient is φ = 72426630.

The previous prime is 72426617. The next prime is 72426661. The reversal of 72426631 is 13662427.

It is a weak prime.

It is an emirp because it is prime and its reverse (13662427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72426631 - 2⁷ = 72426503 is a prime.

It is a super-2 number, since 2×72426631² = 10491233756020322, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 72426631 parts by 12035 straight cuts.

It is a junction number, because it is equal to n+sod(n) for n = 72426593 and 72426602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72426661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36213315 + 36213316.

It is an arithmetic number, because the mean of its divisors is an integer number (36213316).

Almost surely, 2^72426631 is an apocalyptic number.

72426631 is a deficient number, since it is larger than the sum of its proper divisors (1).

72426631 is an equidigital number, since it uses as much as digits as its factorization.

72426631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 31.

The square root of 72426631 is about 8510.3837163785. The cubic root of 72426631 is about 416.8368397870.

The spelling of 72426631 in words is "seventy-two million, four hundred twenty-six thousand, six hundred thirty-one".