461961989 has 4 divisors (see below), whose sum is σ = 462438720. Its totient is φ = 461485260.

The previous prime is 461961979. The next prime is 461962003. The reversal of 461961989 is 989169164.

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 a cyclic number.

It is not a de Polignac number, because 461961989 - 2⁸ = 461961733 is a prime.

It is a super-2 number, since 2×461961989² = 426817758561672242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 461961989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461961949) 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, 236909 + ... + 238850.

It is an arithmetic number, because the mean of its divisors is an integer number (115609680).

Almost surely, 2^461961989 is an apocalyptic number.

It is an amenable number.

461961989 is a deficient number, since it is larger than the sum of its proper divisors (476731).

461961989 is an equidigital number, since it uses as much as digits as its factorization.

461961989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476730.

The product of its digits is 839808, while the sum is 53.

The square root of 461961989 is about 21493.3010261337. The cubic root of 461961989 is about 773.0402034890.

The spelling of 461961989 in words is "four hundred sixty-one million, nine hundred sixty-one thousand, nine hundred eighty-nine".