652621537 has 2 divisors, whose sum is σ = 652621538. Its totient is φ = 652621536.

The previous prime is 652621507. The next prime is 652621553. The reversal of 652621537 is 735126256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 451095121 + 201526416 = 21239^2 + 14196^2 .

It is a cyclic number.

It is not a de Polignac number, because 652621537 - 2¹⁹ = 652097249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 652621496 and 652621505.

It is not a weakly prime, because it can be changed into another prime (652621507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326310768 + 326310769.

It is an arithmetic number, because the mean of its divisors is an integer number (326310769).

Almost surely, 2^652621537 is an apocalyptic number.

It is an amenable number.

652621537 is a deficient number, since it is larger than the sum of its proper divisors (1).

652621537 is an equidigital number, since it uses as much as digits as its factorization.

652621537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 652621537 is about 25546.4584042485. The cubic root of 652621537 is about 867.4020959919.

The spelling of 652621537 in words is "six hundred fifty-two million, six hundred twenty-one thousand, five hundred thirty-seven".