972520357 has 2 divisors, whose sum is σ = 972520358. Its totient is φ = 972520356.

The previous prime is 972520337. The next prime is 972520361. The reversal of 972520357 is 753025279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 808321761 + 164198596 = 28431^2 + 12814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972520357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (972520327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486260178 + 486260179.

It is an arithmetic number, because the mean of its divisors is an integer number (486260179).

Almost surely, 2^972520357 is an apocalyptic number.

It is an amenable number.

972520357 is a deficient number, since it is larger than the sum of its proper divisors (1).

972520357 is an equidigital number, since it uses as much as digits as its factorization.

972520357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 972520357 is about 31185.2586489194. The cubic root of 972520357 is about 990.7549107220.

The spelling of 972520357 in words is "nine hundred seventy-two million, five hundred twenty thousand, three hundred fifty-seven".