8890121961 has 12 divisors (see below), whose sum is σ = 14675756992. Its totient is φ = 5080069656.

The previous prime is 8890121953. The next prime is 8890121969. The reversal of 8890121961 is 1691210988.

It is an interprime number because it is at equal distance from previous prime (8890121953) and next prime (8890121969).

It is not a de Polignac number, because 8890121961 - 2³ = 8890121953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8890121969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70556461 + ... + 70556586.

Almost surely, 2^8890121961 is an apocalyptic number.

It is an amenable number.

8890121961 is a deficient number, since it is larger than the sum of its proper divisors (5785635031).

8890121961 is a wasteful number, since it uses less digits than its factorization.

8890121961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141113060 (or 141113057 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The square root of 8890121961 is about 94287.4432838223. The cubic root of 8890121961 is about 2071.5841189174.

The spelling of 8890121961 in words is "eight billion, eight hundred ninety million, one hundred twenty-one thousand, nine hundred sixty-one".