629377861 has 4 divisors (see below), whose sum is σ = 719288992. Its totient is φ = 539466732.

The previous prime is 629377817. The next prime is 629377871. The reversal of 629377861 is 168773926.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 629377861 - 2¹³ = 629369669 is a prime.

It is a super-2 number, since 2×629377861² = 792232983833870642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629377871) 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 in 3 ways as a sum of consecutive naturals, for example, 44955555 + ... + 44955568.

It is an arithmetic number, because the mean of its divisors is an integer number (179822248).

Almost surely, 2^629377861 is an apocalyptic number.

It is an amenable number.

629377861 is a deficient number, since it is larger than the sum of its proper divisors (89911131).

629377861 is an equidigital number, since it uses as much as digits as its factorization.

629377861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89911130.

The product of its digits is 762048, while the sum is 49.

The square root of 629377861 is about 25087.4044293147. The cubic root of 629377861 is about 856.9796069029.

The spelling of 629377861 in words is "six hundred twenty-nine million, three hundred seventy-seven thousand, eight hundred sixty-one".