90279799 has 2 divisors, whose sum is σ = 90279800. Its totient is φ = 90279798.

The previous prime is 90279793. The next prime is 90279851. The reversal of 90279799 is 99797209.

It is an a-pointer prime, because the next prime (90279851) can be obtained adding 90279799 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90279799 - 2⁵ = 90279767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90279793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45139899 + 45139900.

It is an arithmetic number, because the mean of its divisors is an integer number (45139900).

Almost surely, 2^90279799 is an apocalyptic number.

90279799 is a deficient number, since it is larger than the sum of its proper divisors (1).

90279799 is an equidigital number, since it uses as much as digits as its factorization.

90279799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 642978, while the sum is 52.

The square root of 90279799 is about 9501.5682389803. The cubic root of 90279799 is about 448.6043988804.

The spelling of 90279799 in words is "ninety million, two hundred seventy-nine thousand, seven hundred ninety-nine".