461977139 has 8 divisors (see below), whose sum is σ = 505947120. Its totient is φ = 419211936.

The previous prime is 461977129. The next prime is 461977141. The reversal of 461977139 is 931779164.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 461977139 - 2²⁰ = 460928563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 461977093 and 461977102.

It is not an unprimeable number, because it can be changed into a prime (461977129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300392 + ... + 301925.

It is an arithmetic number, because the mean of its divisors is an integer number (63243390).

Almost surely, 2^461977139 is an apocalyptic number.

461977139 is a deficient number, since it is larger than the sum of its proper divisors (43969981).

461977139 is a wasteful number, since it uses less digits than its factorization.

461977139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602389.

The product of its digits is 285768, while the sum is 47.

The square root of 461977139 is about 21493.6534586375. The cubic root of 461977139 is about 773.0486539902.

The spelling of 461977139 in words is "four hundred sixty-one million, nine hundred seventy-seven thousand, one hundred thirty-nine".