90877907 has 4 divisors (see below), whose sum is σ = 90955656. Its totient is φ = 90800160.

The previous prime is 90877889. The next prime is 90877939. The reversal of 90877907 is 70977809.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90877907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90877307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37094 + ... + 39467.

It is an arithmetic number, because the mean of its divisors is an integer number (22738914).

Almost surely, 2^90877907 is an apocalyptic number.

90877907 is a deficient number, since it is larger than the sum of its proper divisors (77749).

90877907 is a wasteful number, since it uses less digits than its factorization.

90877907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77748.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 90877907 is about 9532.9904542069. The cubic root of 90877907 is about 449.5928943625.

The spelling of 90877907 in words is "ninety million, eight hundred seventy-seven thousand, nine hundred seven".