981191292 has 24 divisors (see below), whose sum is σ = 2363300352. Its totient is φ = 316513200.

The previous prime is 981191291. The next prime is 981191327. The reversal of 981191292 is 292191189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981191291) 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 7 ways as a sum of consecutive naturals, for example, 1318434 + ... + 1319177.

It is an arithmetic number, because the mean of its divisors is an integer number (98470848).

Almost surely, 2^981191292 is an apocalyptic number.

It is an amenable number.

981191292 is an abundant number, since it is smaller than the sum of its proper divisors (1382109060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981191292 is a wasteful number, since it uses less digits than its factorization.

981191292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637649 (or 2637647 counting only the distinct ones).

The product of its digits is 23328, while the sum is 42.

The square root of 981191292 is about 31323.9731196411. The cubic root of 981191292 is about 993.6907072095.

The spelling of 981191292 in words is "nine hundred eighty-one million, one hundred ninety-one thousand, two hundred ninety-two".