90092987 has 4 divisors (see below), whose sum is σ = 90203280. Its totient is φ = 89982696.

The previous prime is 90092983. The next prime is 90093043. The reversal of 90092987 is 78929009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78929009 = 1777 ⋅44417.

It is a cyclic number.

It is not a de Polignac number, because 90092987 - 2² = 90092983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90092983) 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, 53912 + ... + 55557.

It is an arithmetic number, because the mean of its divisors is an integer number (22550820).

Almost surely, 2^90092987 is an apocalyptic number.

90092987 is a deficient number, since it is larger than the sum of its proper divisors (110293).

90092987 is a wasteful number, since it uses less digits than its factorization.

90092987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110292.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 90092987 is about 9491.7325604971. The cubic root of 90092987 is about 448.2947594525.

The spelling of 90092987 in words is "ninety million, ninety-two thousand, nine hundred eighty-seven".