72311453 has 2 divisors, whose sum is σ = 72311454. Its totient is φ = 72311452.

The previous prime is 72311443. The next prime is 72311483. The reversal of 72311453 is 35411327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43388569 + 28922884 = 6587^2 + 5378^2 .

It is a cyclic number.

It is not a de Polignac number, because 72311453 - 2⁶ = 72311389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72311443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36155726 + 36155727.

It is an arithmetic number, because the mean of its divisors is an integer number (36155727).

Almost surely, 2^72311453 is an apocalyptic number.

It is an amenable number.

72311453 is a deficient number, since it is larger than the sum of its proper divisors (1).

72311453 is an equidigital number, since it uses as much as digits as its factorization.

72311453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 72311453 is about 8503.6141140106. The cubic root of 72311453 is about 416.6157613188.

The spelling of 72311453 in words is "seventy-two million, three hundred eleven thousand, four hundred fifty-three".