961013889 has 80 divisors (see below), whose sum is σ = 1617295680. Its totient is φ = 563760000.

The previous prime is 961013881. The next prime is 961013909. The reversal of 961013889 is 988310169.

It is not a de Polignac number, because 961013889 - 2³ = 961013881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (961013881) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5309379 + ... + 5309559.

It is an arithmetic number, because the mean of its divisors is an integer number (20216196).

Almost surely, 2^961013889 is an apocalyptic number.

961013889 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

961013889 is a deficient number, since it is larger than the sum of its proper divisors (656281791).

961013889 is a wasteful number, since it uses less digits than its factorization.

961013889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 961013889 is about 31000.2240153196. The cubic root of 961013889 is about 986.8319943897.

The spelling of 961013889 in words is "nine hundred sixty-one million, thirteen thousand, eight hundred eighty-nine".