99570890 has 8 divisors (see below), whose sum is σ = 179227620. Its totient is φ = 39828352.

The previous prime is 99570881. The next prime is 99570901. The reversal of 99570890 is 9807599.

It can be written as a sum of positive squares in 2 ways, for example, as 98982601 + 588289 = 9949^2 + 767^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4978535 + ... + 4978554.

Almost surely, 2^99570890 is an apocalyptic number.

99570890 is a deficient number, since it is larger than the sum of its proper divisors (79656730).

99570890 is a wasteful number, since it uses less digits than its factorization.

99570890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9957096.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 99570890 is about 9978.5214335592. The cubic root of 99570890 is about 463.4940140508.

The spelling of 99570890 in words is "ninety-nine million, five hundred seventy thousand, eight hundred ninety".