90071699 has 4 divisors (see below), whose sum is σ = 90963600. Its totient is φ = 89179800.

The previous prime is 90071689. The next prime is 90071717. The reversal of 90071699 is 99617009.

It is a happy number.

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-90071699 is a prime.

It is a super-2 number, since 2×90071699² = 16225821921493202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90071659) 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, 445799 + ... + 446000.

It is an arithmetic number, because the mean of its divisors is an integer number (22740900).

Almost surely, 2^90071699 is an apocalyptic number.

90071699 is a deficient number, since it is larger than the sum of its proper divisors (891901).

90071699 is a wasteful number, since it uses less digits than its factorization.

90071699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891900.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 90071699 is about 9490.6110972898. The cubic root of 90071699 is about 448.2594476008.

The spelling of 90071699 in words is "ninety million, seventy-one thousand, six hundred ninety-nine".