651997937 has 2 divisors, whose sum is σ = 651997938. Its totient is φ = 651997936.

The previous prime is 651997877. The next prime is 651997993. The reversal of 651997937 is 739799156.

It is an a-pointer prime, because the next prime (651997993) can be obtained adding 651997937 to its sum of digits (56).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619462321 + 32535616 = 24889^2 + 5704^2 .

It is a cyclic number.

It is not a de Polignac number, because 651997937 - 2⁸ = 651997681 is a prime.

It is not a weakly prime, because it can be changed into another prime (651991937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325998968 + 325998969.

It is an arithmetic number, because the mean of its divisors is an integer number (325998969).

Almost surely, 2^651997937 is an apocalyptic number.

It is an amenable number.

651997937 is a deficient number, since it is larger than the sum of its proper divisors (1).

651997937 is an equidigital number, since it uses as much as digits as its factorization.

651997937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3214890, while the sum is 56.

The square root of 651997937 is about 25534.2502729177. The cubic root of 651997937 is about 867.1257314662.

The spelling of 651997937 in words is "six hundred fifty-one million, nine hundred ninety-seven thousand, nine hundred thirty-seven".