90700990 has 16 divisors (see below), whose sum is σ = 163869120. Its totient is φ = 36145440.

The previous prime is 90700969. The next prime is 90700997. The reversal of 90700990 is 9900709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90700997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14025 + ... + 19444.

It is an arithmetic number, because the mean of its divisors is an integer number (10241820).

Almost surely, 2^90700990 is an apocalyptic number.

90700990 is a deficient number, since it is larger than the sum of its proper divisors (73168130).

90700990 is a wasteful number, since it uses less digits than its factorization.

90700990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33747.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 90700990 is about 9523.7067363501. The cubic root of 90700990 is about 449.3009557972.

The spelling of 90700990 in words is "ninety million, seven hundred thousand, nine hundred ninety".