90662399 has 4 divisors (see below), whose sum is σ = 90804480. Its totient is φ = 90520320.

The previous prime is 90662387. The next prime is 90662401. The reversal of 90662399 is 99326609.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90662399 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 (90662359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70079 + ... + 71360.

It is an arithmetic number, because the mean of its divisors is an integer number (22701120).

Almost surely, 2^90662399 is an apocalyptic number.

90662399 is a deficient number, since it is larger than the sum of its proper divisors (142081).

90662399 is a wasteful number, since it uses less digits than its factorization.

90662399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142080.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 90662399 is about 9521.6804714294. The cubic root of 90662399 is about 449.2372246558.

The spelling of 90662399 in words is "ninety million, six hundred sixty-two thousand, three hundred ninety-nine".