99120961 has 8 divisors (see below), whose sum is σ = 103530240. Its totient is φ = 94720032.

The previous prime is 99120953. The next prime is 99120997. The reversal of 99120961 is 16902199.

It is the 4065-th star number.

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

It is a cyclic number.

It is not a de Polignac number, because 99120961 - 2³ = 99120953 is a prime.

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 99120961.

It is not an unprimeable number, because it can be changed into a prime (99120941) 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, 46405 + ... + 48493.

It is an arithmetic number, because the mean of its divisors is an integer number (12941280).

Almost surely, 2^99120961 is an apocalyptic number.

It is an amenable number.

99120961 is a deficient number, since it is larger than the sum of its proper divisors (4409279).

99120961 is a wasteful number, since it uses less digits than its factorization.

99120961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 99120961 is about 9955.9510344316. The cubic root of 99120961 is about 462.7948328049.

It can be divided in two parts, 991 and 20961, that added together give a cube (21952 = 28³).

The spelling of 99120961 in words is "ninety-nine million, one hundred twenty thousand, nine hundred sixty-one".