90769187 has 2 divisors, whose sum is σ = 90769188. Its totient is φ = 90769186.

The previous prime is 90769127. The next prime is 90769193. The reversal of 90769187 is 78196709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90769187 - 2⁶ = 90769123 is a prime.

It is not a weakly prime, because it can be changed into another prime (90769117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45384593 + 45384594.

It is an arithmetic number, because the mean of its divisors is an integer number (45384594).

Almost surely, 2^90769187 is an apocalyptic number.

90769187 is a deficient number, since it is larger than the sum of its proper divisors (1).

90769187 is an equidigital number, since it uses as much as digits as its factorization.

90769187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 90769187 is about 9527.2864447334. The cubic root of 90769187 is about 449.4135356083.

The spelling of 90769187 in words is "ninety million, seven hundred sixty-nine thousand, one hundred eighty-seven".