99581897 has 8 divisors (see below), whose sum is σ = 100257696. Its totient is φ = 98908992.

The previous prime is 99581893. The next prime is 99581939. The reversal of 99581897 is 79818599.

It is a happy 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 99581897 - 2² = 99581893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99581893) 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, 167633 + ... + 168225.

It is an arithmetic number, because the mean of its divisors is an integer number (12532212).

Almost surely, 2^99581897 is an apocalyptic number.

It is an amenable number.

99581897 is a deficient number, since it is larger than the sum of its proper divisors (675799).

99581897 is a wasteful number, since it uses less digits than its factorization.

99581897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447.

The product of its digits is 1632960, while the sum is 56.

The square root of 99581897 is about 9979.0729529351. The cubic root of 99581897 is about 463.5110923041.

The spelling of 99581897 in words is "ninety-nine million, five hundred eighty-one thousand, eight hundred ninety-seven".