72497851 has 2 divisors, whose sum is σ = 72497852. Its totient is φ = 72497850.

The previous prime is 72497849. The next prime is 72497857. The reversal of 72497851 is 15879427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72497851 - 2¹ = 72497849 is a prime.

Together with 72497849, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 72497798 and 72497807.

It is not a weakly prime, because it can be changed into another prime (72497857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36248925 + 36248926.

It is an arithmetic number, because the mean of its divisors is an integer number (36248926).

Almost surely, 2^72497851 is an apocalyptic number.

72497851 is a deficient number, since it is larger than the sum of its proper divisors (1).

72497851 is an equidigital number, since it uses as much as digits as its factorization.

72497851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 72497851 is about 8514.5669884029. The cubic root of 72497851 is about 416.9734257996.

The spelling of 72497851 in words is "seventy-two million, four hundred ninety-seven thousand, eight hundred fifty-one".