90564829 has 2 divisors, whose sum is σ = 90564830. Its totient is φ = 90564828.

The previous prime is 90564827. The next prime is 90564841. The reversal of 90564829 is 92846509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46607929 + 43956900 = 6827^2 + 6630^2 .

It is a cyclic number.

It is not a de Polignac number, because 90564829 - 2¹ = 90564827 is a prime.

Together with 90564827, 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 (90564821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45282414 + 45282415.

It is an arithmetic number, because the mean of its divisors is an integer number (45282415).

Almost surely, 2^90564829 is an apocalyptic number.

It is an amenable number.

90564829 is a deficient number, since it is larger than the sum of its proper divisors (1).

90564829 is an equidigital number, since it uses as much as digits as its factorization.

90564829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 90564829 is about 9516.5555218262. Note that the first 4 decimals coincide. The cubic root of 90564829 is about 449.0760118863.

The spelling of 90564829 in words is "ninety million, five hundred sixty-four thousand, eight hundred twenty-nine".