90071651 has 16 divisors (see below), whose sum is σ = 95504640. Its totient is φ = 84823200.

The previous prime is 90071591. The next prime is 90071659. The reversal of 90071651 is 15617009.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 90071651 - 2⁶ = 90071587 is a prime.

It is a super-2 number, since 2×90071651² = 16225804627731602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

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 15 ways as a sum of consecutive naturals, for example, 293240 + ... + 293546.

It is an arithmetic number, because the mean of its divisors is an integer number (5969040).

Almost surely, 2^90071651 is an apocalyptic number.

90071651 is a deficient number, since it is larger than the sum of its proper divisors (5432989).

90071651 is a wasteful number, since it uses less digits than its factorization.

90071651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 90071651 is about 9490.6085684744. The cubic root of 90071651 is about 448.2593679736.

The spelling of 90071651 in words is "ninety million, seventy-one thousand, six hundred fifty-one".