629971477 has 2 divisors, whose sum is σ = 629971478. Its totient is φ = 629971476.

The previous prime is 629971471. The next prime is 629971481. The reversal of 629971477 is 774179926.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 512162161 + 117809316 = 22631^2 + 10854^2 .

It is a cyclic number.

It is not a de Polignac number, because 629971477 - 2²⁷ = 495753749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (629971471) 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, 314985738 + 314985739.

It is an arithmetic number, because the mean of its divisors is an integer number (314985739).

Almost surely, 2^629971477 is an apocalyptic number.

It is an amenable number.

629971477 is a deficient number, since it is larger than the sum of its proper divisors (1).

629971477 is an equidigital number, since it uses as much as digits as its factorization.

629971477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 52.

The square root of 629971477 is about 25099.2325978306. The cubic root of 629971477 is about 857.2489506388.

The spelling of 629971477 in words is "six hundred twenty-nine million, nine hundred seventy-one thousand, four hundred seventy-seven".