629148977 has 4 divisors (see below), whose sum is σ = 644494116. Its totient is φ = 613803840.

The previous prime is 629148973. The next prime is 629149009. The reversal of 629148977 is 779841926.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27133681 + 602015296 = 5209^2 + 24536^2 .

It is a cyclic number.

It is not a de Polignac number, because 629148977 - 2² = 629148973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629148973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7672508 + ... + 7672589.

It is an arithmetic number, because the mean of its divisors is an integer number (161123529).

Almost surely, 2^629148977 is an apocalyptic number.

It is an amenable number.

629148977 is a deficient number, since it is larger than the sum of its proper divisors (15345139).

629148977 is a wasteful number, since it uses less digits than its factorization.

629148977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15345138.

The product of its digits is 1524096, while the sum is 53.

The square root of 629148977 is about 25082.8422831225. The cubic root of 629148977 is about 856.8757092208.

The spelling of 629148977 in words is "six hundred twenty-nine million, one hundred forty-eight thousand, nine hundred seventy-seven".