90679990 has 16 divisors (see below), whose sum is σ = 165192048. Its totient is φ = 35834656.

The previous prime is 90679973. The next prime is 90680003. The reversal of 90679990 is 9997609.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53797 + ... + 55456.

It is an arithmetic number, because the mean of its divisors is an integer number (10324503).

Almost surely, 2^90679990 is an apocalyptic number.

90679990 is a deficient number, since it is larger than the sum of its proper divisors (74512058).

90679990 is a wasteful number, since it uses less digits than its factorization.

90679990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109343.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 90679990 is about 9522.6041606275. The cubic root of 90679990 is about 449.2662775710.

The spelling of 90679990 in words is "ninety million, six hundred seventy-nine thousand, nine hundred ninety".