90755987 has 6 divisors (see below), whose sum is σ = 105573348. Its totient is φ = 77790804.

The previous prime is 90755957. The next prime is 90756007. The reversal of 90755987 is 78955709.

It is not a de Polignac number, because 90755987 - 2¹⁴ = 90739603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90755957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 926033 + ... + 926130.

It is an arithmetic number, because the mean of its divisors is an integer number (17595558).

Almost surely, 2^90755987 is an apocalyptic number.

90755987 is a deficient number, since it is larger than the sum of its proper divisors (14817361).

90755987 is a wasteful number, since it uses less digits than its factorization.

90755987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852177 (or 1852170 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 50.

The square root of 90755987 is about 9526.5936724519. The cubic root of 90755987 is about 449.3917494110.

The spelling of 90755987 in words is "ninety million, seven hundred fifty-five thousand, nine hundred eighty-seven".