90626861 has 4 divisors (see below), whose sum is σ = 97598172. Its totient is φ = 83655552.

The previous prime is 90626797. The next prime is 90626863. The reversal of 90626861 is 16862609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16862609 = 197 ⋅85597.

It can be written as a sum of positive squares in 2 ways, for example, as 57851236 + 32775625 = 7606^2 + 5725^2 .

It is a cyclic number.

It is not a de Polignac number, because 90626861 - 2⁶ = 90626797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90626863) 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, 3485636 + ... + 3485661.

It is an arithmetic number, because the mean of its divisors is an integer number (24399543).

Almost surely, 2^90626861 is an apocalyptic number.

It is an amenable number.

90626861 is a deficient number, since it is larger than the sum of its proper divisors (6971311).

90626861 is a wasteful number, since it uses less digits than its factorization.

90626861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6971310.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 90626861 is about 9519.8141263367. The cubic root of 90626861 is about 449.1785193965.

The spelling of 90626861 in words is "ninety million, six hundred twenty-six thousand, eight hundred sixty-one".