90770231 has 2 divisors, whose sum is σ = 90770232. Its totient is φ = 90770230.

The previous prime is 90770227. The next prime is 90770243. The reversal of 90770231 is 13207709.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90770231 - 2² = 90770227 is a prime.

It is a super-2 number, since 2×90770231² = 16478469671586722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90770194 and 90770203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90770831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45385115 + 45385116.

It is an arithmetic number, because the mean of its divisors is an integer number (45385116).

Almost surely, 2^90770231 is an apocalyptic number.

90770231 is a deficient number, since it is larger than the sum of its proper divisors (1).

90770231 is an equidigital number, since it uses as much as digits as its factorization.

90770231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 90770231 is about 9527.3412345733. The cubic root of 90770231 is about 449.4152586083.

The spelling of 90770231 in words is "ninety million, seven hundred seventy thousand, two hundred thirty-one".