99575961 has 4 divisors (see below), whose sum is σ = 132767952. Its totient is φ = 66383972.

The previous prime is 99575951. The next prime is 99575977. The reversal of 99575961 is 16957599.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16957599 = 3 ⋅5652533.

It is a cyclic number.

It is not a de Polignac number, because 99575961 - 2⁵ = 99575929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99575951) 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, 16595991 + ... + 16595996.

It is an arithmetic number, because the mean of its divisors is an integer number (33191988).

Almost surely, 2^99575961 is an apocalyptic number.

It is an amenable number.

99575961 is a deficient number, since it is larger than the sum of its proper divisors (33191991).

99575961 is a wasteful number, since it uses less digits than its factorization.

99575961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33191990.

The product of its digits is 765450, while the sum is 51.

The square root of 99575961 is about 9978.7755260854. The cubic root of 99575961 is about 463.5018822749.

The spelling of 99575961 in words is "ninety-nine million, five hundred seventy-five thousand, nine hundred sixty-one".