101498989 has 2 divisors, whose sum is σ = 101498990. Its totient is φ = 101498988.

The previous prime is 101498987. The next prime is 101499019. The reversal of 101498989 is 989894101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54686025 + 46812964 = 7395^2 + 6842^2 .

It is a cyclic number.

It is not a de Polignac number, because 101498989 - 2¹ = 101498987 is a prime.

Together with 101498987, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101498987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50749494 + 50749495.

It is an arithmetic number, because the mean of its divisors is an integer number (50749495).

Almost surely, 2^101498989 is an apocalyptic number.

It is an amenable number.

101498989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101498989 is an equidigital number, since it uses as much as digits as its factorization.

101498989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 101498989 is about 10074.6706645925. The cubic root of 101498989 is about 466.4666207779.

The spelling of 101498989 in words is "one hundred one million, four hundred ninety-eight thousand, nine hundred eighty-nine".