1149391391 has 8 divisors (see below), whose sum is σ = 1155686400. Its totient is φ = 1143109240.

The previous prime is 1149391379. The next prime is 1149391457. The reversal of 1149391391 is 1931939411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1149391391 - 2²⁶ = 1082282527 is a prime.

It is a super-2 number, since 2×1149391391² = 2642201139409829762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149321391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215090 + ... + 220368.

It is an arithmetic number, because the mean of its divisors is an integer number (144460800).

Almost surely, 2^1149391391 is an apocalyptic number.

1149391391 is a deficient number, since it is larger than the sum of its proper divisors (6295009).

1149391391 is an equidigital number, since it uses as much as digits as its factorization.

1149391391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429.

The product of its digits is 26244, while the sum is 41.

The square root of 1149391391 is about 33902.6752779187. The cubic root of 1149391391 is about 1047.5046993142.

The spelling of 1149391391 in words is "one billion, one hundred forty-nine million, three hundred ninety-one thousand, three hundred ninety-one".