90552901 has 2 divisors, whose sum is σ = 90552902. Its totient is φ = 90552900.

The previous prime is 90552899. The next prime is 90552907. The reversal of 90552901 is 10925509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83740801 + 6812100 = 9151^2 + 2610^2 .

It is a cyclic number.

It is not a de Polignac number, because 90552901 - 2¹ = 90552899 is a prime.

Together with 90552899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90552907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45276450 + 45276451.

It is an arithmetic number, because the mean of its divisors is an integer number (45276451).

Almost surely, 2^90552901 is an apocalyptic number.

It is an amenable number.

90552901 is a deficient number, since it is larger than the sum of its proper divisors (1).

90552901 is an equidigital number, since it uses as much as digits as its factorization.

90552901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 90552901 is about 9515.9288038530. The cubic root of 90552901 is about 449.0562955721.

The spelling of 90552901 in words is "ninety million, five hundred fifty-two thousand, nine hundred one".