90771698 has 4 divisors (see below), whose sum is σ = 136157550. Its totient is φ = 45385848.

The previous prime is 90771691. The next prime is 90771713. The reversal of 90771698 is 89617709.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 86918329 + 3853369 = 9323^2 + 1963^2 .

It is not an unprimeable number, because it can be changed into a prime (90771691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22692923 + ... + 22692926.

Almost surely, 2^90771698 is an apocalyptic number.

90771698 is a deficient number, since it is larger than the sum of its proper divisors (45385852).

90771698 is a wasteful number, since it uses less digits than its factorization.

90771698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45385851.

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

The square root of 90771698 is about 9527.4182232124. The cubic root of 90771698 is about 449.4176796981.

The spelling of 90771698 in words is "ninety million, seven hundred seventy-one thousand, six hundred ninety-eight".