991412653 has 32 divisors (see below), whose sum is σ = 1260258048. Its totient is φ = 763868160.

The previous prime is 991412623. The next prime is 991412663. The reversal of 991412653 is 356214199.

It is not a de Polignac number, because 991412653 - 2⁵ = 991412621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991412623) 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 31 ways as a sum of consecutive naturals, for example, 903201 + ... + 904297.

It is an arithmetic number, because the mean of its divisors is an integer number (39383064).

Almost surely, 2^991412653 is an apocalyptic number.

It is an amenable number.

991412653 is a deficient number, since it is larger than the sum of its proper divisors (268845395).

991412653 is a wasteful number, since it uses less digits than its factorization.

991412653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234 (or 1212 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 991412653 is about 31486.7059725212. The cubic root of 991412653 is about 997.1293180708.

The spelling of 991412653 in words is "nine hundred ninety-one million, four hundred twelve thousand, six hundred fifty-three".