99690087 has 16 divisors (see below), whose sum is σ = 152133632. Its totient is φ = 56881440.

The previous prime is 99690067. The next prime is 99690103. The reversal of 99690087 is 78009699.

It is a happy number.

It is not a de Polignac number, because 99690087 - 2¹² = 99685991 is a prime.

It is a super-2 number, since 2×99690087² = 19876226892135138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99690067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12762 + ... + 19032.

It is an arithmetic number, because the mean of its divisors is an integer number (9508352).

Almost surely, 2^99690087 is an apocalyptic number.

99690087 is a deficient number, since it is larger than the sum of its proper divisors (52443545).

99690087 is a wasteful number, since it uses less digits than its factorization.

99690087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7038.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 99690087 is about 9984.4923256017. The cubic root of 99690087 is about 463.6788909262.

The spelling of 99690087 in words is "ninety-nine million, six hundred ninety thousand, eighty-seven".