651461929 has 2 divisors, whose sum is σ = 651461930. Its totient is φ = 651461928.

The previous prime is 651461917. The next prime is 651461939. The reversal of 651461929 is 929164156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 647600704 + 3861225 = 25448^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 651461929 - 2¹⁷ = 651330857 is a prime.

It is not a weakly prime, because it can be changed into another prime (651461939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325730964 + 325730965.

It is an arithmetic number, because the mean of its divisors is an integer number (325730965).

Almost surely, 2^651461929 is an apocalyptic number.

It is an amenable number.

651461929 is a deficient number, since it is larger than the sum of its proper divisors (1).

651461929 is an equidigital number, since it uses as much as digits as its factorization.

651461929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 651461929 is about 25523.7522515793. The cubic root of 651461929 is about 866.8880447457. Note that the first 3 decimals are identical.

The spelling of 651461929 in words is "six hundred fifty-one million, four hundred sixty-one thousand, nine hundred twenty-nine".