90077971 has 8 divisors (see below), whose sum is σ = 93209600. Its totient is φ = 86960520.

The previous prime is 90077941. The next prime is 90077987. The reversal of 90077971 is 17977009.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90077971 - 2¹⁹ = 89553683 is a prime.

It is a super-2 number, since 2×90077971² = 16228081718953682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90077921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10300 + ... + 16918.

It is an arithmetic number, because the mean of its divisors is an integer number (11651200).

Almost surely, 2^90077971 is an apocalyptic number.

90077971 is a deficient number, since it is larger than the sum of its proper divisors (3131629).

90077971 is a wasteful number, since it uses less digits than its factorization.

90077971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089.

The product of its (nonzero) digits is 27783, while the sum is 40.

The square root of 90077971 is about 9490.9415233685. The cubic root of 90077971 is about 448.2698519713.

The spelling of 90077971 in words is "ninety million, seventy-seven thousand, nine hundred seventy-one".