98643631 has 4 divisors (see below), whose sum is σ = 100115992. Its totient is φ = 97171272.

The previous prime is 98643617. The next prime is 98643661. The reversal of 98643631 is 13634689.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 98643631 - 2¹¹ = 98641583 is a prime.

It is a super-2 number, since 2×98643631² = 19461131873728322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98643661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736080 + ... + 736213.

It is an arithmetic number, because the mean of its divisors is an integer number (25028998).

Almost surely, 2^98643631 is an apocalyptic number.

98643631 is a deficient number, since it is larger than the sum of its proper divisors (1472361).

98643631 is a wasteful number, since it uses less digits than its factorization.

98643631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472360.

The product of its digits is 93312, while the sum is 40.

The square root of 98643631 is about 9931.9500099427. The cubic root of 98643631 is about 462.0507540301.

The spelling of 98643631 in words is "ninety-eight million, six hundred forty-three thousand, six hundred thirty-one".