981169431 has 16 divisors (see below), whose sum is σ = 1428752640. Its totient is φ = 593982720.

The previous prime is 981169429. The next prime is 981169439. The reversal of 981169431 is 134961189.

It is not a de Polignac number, because 981169431 - 2¹ = 981169429 is a prime.

It is a super-2 number, since 2×981169431² = 1925386904657727522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981169439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14151 + ... + 46503.

It is an arithmetic number, because the mean of its divisors is an integer number (89297040).

Almost surely, 2^981169431 is an apocalyptic number.

981169431 is a deficient number, since it is larger than the sum of its proper divisors (447583209).

981169431 is a wasteful number, since it uses less digits than its factorization.

981169431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33286.

The product of its digits is 46656, while the sum is 42.

The square root of 981169431 is about 31323.6241677109. The cubic root of 981169431 is about 993.6833273255.

The spelling of 981169431 in words is "nine hundred eighty-one million, one hundred sixty-nine thousand, four hundred thirty-one".