90610987 has 4 divisors (see below), whose sum is σ = 90646920. Its totient is φ = 90575056.

The previous prime is 90610957. The next prime is 90611009. The reversal of 90610987 is 78901609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90610987 - 2⁷ = 90610859 is a prime.

It is a super-2 number, since 2×90610987² = 16420701930228338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90610907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13873 + ... + 19330.

It is an arithmetic number, because the mean of its divisors is an integer number (22661730).

Almost surely, 2^90610987 is an apocalyptic number.

90610987 is a deficient number, since it is larger than the sum of its proper divisors (35933).

90610987 is a wasteful number, since it uses less digits than its factorization.

90610987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35932.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 90610987 is about 9518.9803550590. The cubic root of 90610987 is about 449.1522921606.

The spelling of 90610987 in words is "ninety million, six hundred ten thousand, nine hundred eighty-seven".