991254693 has 32 divisors (see below), whose sum is σ = 1579092480. Its totient is φ = 545135040.

The previous prime is 991254689. The next prime is 991254701. The reversal of 991254693 is 396452199.

991254693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 991254693 - 2² = 991254689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991254613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5730 + ... + 44892.

It is an arithmetic number, because the mean of its divisors is an integer number (49346640).

Almost surely, 2^991254693 is an apocalyptic number.

It is an amenable number.

991254693 is a deficient number, since it is larger than the sum of its proper divisors (587837787).

991254693 is a wasteful number, since it uses less digits than its factorization.

991254693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39249.

The product of its digits is 524880, while the sum is 48.

The square root of 991254693 is about 31484.1975124029. The cubic root of 991254693 is about 997.0763583161.

The spelling of 991254693 in words is "nine hundred ninety-one million, two hundred fifty-four thousand, six hundred ninety-three".