72419657 has 2 divisors, whose sum is σ = 72419658. Its totient is φ = 72419656.

The previous prime is 72419651. The next prime is 72419687. The reversal of 72419657 is 75691427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37503376 + 34916281 = 6124^2 + 5909^2 .

It is a cyclic number.

It is not a de Polignac number, because 72419657 - 2⁶ = 72419593 is a prime.

It is not a weakly prime, because it can be changed into another prime (72419651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36209828 + 36209829.

It is an arithmetic number, because the mean of its divisors is an integer number (36209829).

Almost surely, 2^72419657 is an apocalyptic number.

It is an amenable number.

72419657 is a deficient number, since it is larger than the sum of its proper divisors (1).

72419657 is an equidigital number, since it uses as much as digits as its factorization.

72419657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 72419657 is about 8509.9739717581. The cubic root of 72419657 is about 416.8234602083.

The spelling of 72419657 in words is "seventy-two million, four hundred nineteen thousand, six hundred fifty-seven".