90988397 has 4 divisors (see below), whose sum is σ = 95777280. Its totient is φ = 86199516.

The previous prime is 90988363. The next prime is 90988423. The reversal of 90988397 is 79388909.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90988397 - 2¹⁰ = 90987373 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 (90988327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2394413 + ... + 2394450.

It is an arithmetic number, because the mean of its divisors is an integer number (23944320).

Almost surely, 2^90988397 is an apocalyptic number.

It is an amenable number.

90988397 is a deficient number, since it is larger than the sum of its proper divisors (4788883).

90988397 is a wasteful number, since it uses less digits than its factorization.

90988397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4788882.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 90988397 is about 9538.7838323342. The cubic root of 90988397 is about 449.7750266400.

The spelling of 90988397 in words is "ninety million, nine hundred eighty-eight thousand, three hundred ninety-seven".