90077009 has 4 divisors (see below), whose sum is σ = 98265840. Its totient is φ = 81888180.

The previous prime is 90076997. The next prime is 90077027.

90077009 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-90077009 is a prime.

It is a super-2 number, since 2×90077009² = 16227735100772162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90077069) 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, 4094399 + ... + 4094420.

It is an arithmetic number, because the mean of its divisors is an integer number (24566460).

Almost surely, 2^90077009 is an apocalyptic number.

It is an amenable number.

90077009 is a deficient number, since it is larger than the sum of its proper divisors (8188831).

90077009 is a wasteful number, since it uses less digits than its factorization.

90077009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8188830.

The product of its (nonzero) digits is 3969, while the sum is 32.

The square root of 90077009 is about 9490.8908433297. The cubic root of 90077009 is about 448.2682561793.

The spelling of 90077009 in words is "ninety million, seventy-seven thousand, nine".