474691639 has 4 divisors (see below), whose sum is σ = 482737320. Its totient is φ = 466645960.

The previous prime is 474691631. The next prime is 474691661. The reversal of 474691639 is 936196474.

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

It is a cyclic number.

It is not a de Polignac number, because 474691639 - 2³ = 474691631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 474691592 and 474691601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (474691631) 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, 4022752 + ... + 4022869.

It is an arithmetic number, because the mean of its divisors is an integer number (120684330).

Almost surely, 2^474691639 is an apocalyptic number.

474691639 is a deficient number, since it is larger than the sum of its proper divisors (8045681).

474691639 is an equidigital number, since it uses as much as digits as its factorization.

474691639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8045680.

The product of its digits is 979776, while the sum is 49.

The square root of 474691639 is about 21787.4192826961. The cubic root of 474691639 is about 780.0764986335.

The spelling of 474691639 in words is "four hundred seventy-four million, six hundred ninety-one thousand, six hundred thirty-nine".