90742801 has 2 divisors, whose sum is σ = 90742802. Its totient is φ = 90742800.

The previous prime is 90742789. The next prime is 90742819. The reversal of 90742801 is 10824709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57380625 + 33362176 = 7575^2 + 5776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90742801 is a prime.

It is not a weakly prime, because it can be changed into another prime (90742831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45371400 + 45371401.

It is an arithmetic number, because the mean of its divisors is an integer number (45371401).

Almost surely, 2^90742801 is an apocalyptic number.

It is an amenable number.

90742801 is a deficient number, since it is larger than the sum of its proper divisors (1).

90742801 is an equidigital number, since it uses as much as digits as its factorization.

90742801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 90742801 is about 9525.9015846270. The cubic root of 90742801 is about 449.3699842110.

The spelling of 90742801 in words is "ninety million, seven hundred forty-two thousand, eight hundred one".