90697199 has 4 divisors (see below), whose sum is σ = 91240464. Its totient is φ = 90153936.

The previous prime is 90697157. The next prime is 90697237. The reversal of 90697199 is 99179609.

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

It is a cyclic number.

It is not a de Polignac number, because 90697199 - 2⁸ = 90696943 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 (90997199) 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, 271382 + ... + 271715.

It is an arithmetic number, because the mean of its divisors is an integer number (22810116).

Almost surely, 2^90697199 is an apocalyptic number.

90697199 is a deficient number, since it is larger than the sum of its proper divisors (543265).

90697199 is a wasteful number, since it uses less digits than its factorization.

90697199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543264.

The product of its (nonzero) digits is 275562, while the sum is 50.

The square root of 90697199 is about 9523.5077046223. The cubic root of 90697199 is about 449.2946959477.

The spelling of 90697199 in words is "ninety million, six hundred ninety-seven thousand, one hundred ninety-nine".