90978299 has 2 divisors, whose sum is σ = 90978300. Its totient is φ = 90978298.

The previous prime is 90978281. The next prime is 90978319. The reversal of 90978299 is 99287909.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90978299 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90978299.

It is not a weakly prime, because it can be changed into another prime (90978259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45489149 + 45489150.

It is an arithmetic number, because the mean of its divisors is an integer number (45489150).

Almost surely, 2^90978299 is an apocalyptic number.

90978299 is a deficient number, since it is larger than the sum of its proper divisors (1).

90978299 is an equidigital number, since it uses as much as digits as its factorization.

90978299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 90978299 is about 9538.2545048871. The cubic root of 90978299 is about 449.7583871695.

The spelling of 90978299 in words is "ninety million, nine hundred seventy-eight thousand, two hundred ninety-nine".