90900629 has 2 divisors, whose sum is σ = 90900630. Its totient is φ = 90900628.

The previous prime is 90900619. The next prime is 90900637. The reversal of 90900629 is 92600909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90763729 + 136900 = 9527^2 + 370^2 .

It is an emirp because it is prime and its reverse (92600909) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90900629 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90900619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45450314 + 45450315.

It is an arithmetic number, because the mean of its divisors is an integer number (45450315).

Almost surely, 2^90900629 is an apocalyptic number.

It is an amenable number.

90900629 is a deficient number, since it is larger than the sum of its proper divisors (1).

90900629 is an equidigital number, since it uses as much as digits as its factorization.

90900629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 90900629 is about 9534.1821358730. The cubic root of 90900629 is about 449.6303614756.

The spelling of 90900629 in words is "ninety million, nine hundred thousand, six hundred twenty-nine".