900638429 has 2 divisors, whose sum is σ = 900638430. Its totient is φ = 900638428.

The previous prime is 900638383. The next prime is 900638441. The reversal of 900638429 is 924836009.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 684607225 + 216031204 = 26165^2 + 14698^2 .

It is a cyclic number.

It is not a de Polignac number, because 900638429 - 2²⁴ = 883861213 is a prime.

It is a super-2 number, since 2×900638429² = 1622299159583176082, which contains 22 as substring.

It is a Sophie Germain 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 (900688429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450319214 + 450319215.

It is an arithmetic number, because the mean of its divisors is an integer number (450319215).

Almost surely, 2^900638429 is an apocalyptic number.

It is an amenable number.

900638429 is a deficient number, since it is larger than the sum of its proper divisors (1).

900638429 is an equidigital number, since it uses as much as digits as its factorization.

900638429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 900638429 is about 30010.6385970042. The cubic root of 900638429 is about 965.7176256166.

The spelling of 900638429 in words is "nine hundred million, six hundred thirty-eight thousand, four hundred twenty-nine".