72452789 has 2 divisors, whose sum is σ = 72452790. Its totient is φ = 72452788.

The previous prime is 72452753. The next prime is 72452791. The reversal of 72452789 is 98725427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41705764 + 30747025 = 6458^2 + 5545^2 .

It is a cyclic number.

It is not a de Polignac number, because 72452789 - 2¹² = 72448693 is a prime.

Together with 72452791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72452389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36226394 + 36226395.

It is an arithmetic number, because the mean of its divisors is an integer number (36226395).

Almost surely, 2^72452789 is an apocalyptic number.

It is an amenable number.

72452789 is a deficient number, since it is larger than the sum of its proper divisors (1).

72452789 is an equidigital number, since it uses as much as digits as its factorization.

72452789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 72452789 is about 8511.9204061128. The cubic root of 72452789 is about 416.8870161079.

The spelling of 72452789 in words is "seventy-two million, four hundred fifty-two thousand, seven hundred eighty-nine".