99790961 has 4 divisors (see below), whose sum is σ = 102488052. Its totient is φ = 97093872.

The previous prime is 99790921. The next prime is 99790967. The reversal of 99790961 is 16909799.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66324736 + 33466225 = 8144^2 + 5785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99790961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99790967) 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, 1348490 + ... + 1348563.

It is an arithmetic number, because the mean of its divisors is an integer number (25622013).

Almost surely, 2^99790961 is an apocalyptic number.

It is an amenable number.

99790961 is a deficient number, since it is larger than the sum of its proper divisors (2697091).

99790961 is a wasteful number, since it uses less digits than its factorization.

99790961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697090.

The product of its (nonzero) digits is 275562, while the sum is 50.

The square root of 99790961 is about 9989.5425821206. The cubic root of 99790961 is about 463.8352333754.

The spelling of 99790961 in words is "ninety-nine million, seven hundred ninety thousand, nine hundred sixty-one".