98991431 has 24 divisors (see below), whose sum is σ = 126135072. Its totient is φ = 76032000.

The previous prime is 98991397. The next prime is 98991449. The reversal of 98991431 is 13419989.

It is not a de Polignac number, because 98991431 - 2¹⁸ = 98729287 is a prime.

It is a super-2 number, since 2×98991431² = 19598606822855522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98991481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61031 + ... + 62631.

It is an arithmetic number, because the mean of its divisors is an integer number (5255628).

Almost surely, 2^98991431 is an apocalyptic number.

98991431 is a deficient number, since it is larger than the sum of its proper divisors (27143641).

98991431 is a wasteful number, since it uses less digits than its factorization.

98991431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703 (or 1692 counting only the distinct ones).

The product of its digits is 69984, while the sum is 44.

The square root of 98991431 is about 9949.4437532960. The cubic root of 98991431 is about 462.5931534789.

The spelling of 98991431 in words is "ninety-eight million, nine hundred ninety-one thousand, four hundred thirty-one".