989902541 has 2 divisors, whose sum is σ = 989902542. Its totient is φ = 989902540.

The previous prime is 989902523. The next prime is 989902547. The reversal of 989902541 is 145209989.

989902541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 951722500 + 38180041 = 30850^2 + 6179^2 .

It is a cyclic number.

It is not a de Polignac number, because 989902541 - 2²² = 985708237 is a prime.

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 (989902547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494951270 + 494951271.

It is an arithmetic number, because the mean of its divisors is an integer number (494951271).

Almost surely, 2^989902541 is an apocalyptic number.

It is an amenable number.

989902541 is a deficient number, since it is larger than the sum of its proper divisors (1).

989902541 is an equidigital number, since it uses as much as digits as its factorization.

989902541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 989902541 is about 31462.7166818125. The cubic root of 989902541 is about 996.6227876095.

The spelling of 989902541 in words is "nine hundred eighty-nine million, nine hundred two thousand, five hundred forty-one".