98409631 has 2 divisors, whose sum is σ = 98409632. Its totient is φ = 98409630.

The previous prime is 98409629. The next prime is 98409643. The reversal of 98409631 is 13690489.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 98409631 - 2¹ = 98409629 is a prime.

It is a super-2 number, since 2×98409631² = 19368910947112322, which contains 22 as substring.

Together with 98409629, 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 (98409601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49204815 + 49204816.

It is an arithmetic number, because the mean of its divisors is an integer number (49204816).

Almost surely, 2^98409631 is an apocalyptic number.

98409631 is a deficient number, since it is larger than the sum of its proper divisors (1).

98409631 is an equidigital number, since it uses as much as digits as its factorization.

98409631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 98409631 is about 9920.1628514859. The cubic root of 98409631 is about 461.6851096010.

The spelling of 98409631 in words is "ninety-eight million, four hundred nine thousand, six hundred thirty-one".