1154976991 has 24 divisors (see below), whose sum is σ = 1426320576. Its totient is φ = 929295360.

The previous prime is 1154976961. The next prime is 1154977001. The reversal of 1154976991 is 1996794511.

It is not a de Polignac number, because 1154976991 - 2²⁷ = 1020759263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154976931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357415 + ... + 360631.

It is an arithmetic number, because the mean of its divisors is an integer number (59430024).

Almost surely, 2^1154976991 is an apocalyptic number.

1154976991 is a deficient number, since it is larger than the sum of its proper divisors (271343585).

1154976991 is a wasteful number, since it uses less digits than its factorization.

1154976991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679 (or 3672 counting only the distinct ones).

The product of its digits is 612360, while the sum is 52.

The square root of 1154976991 is about 33984.9524201521. The cubic root of 1154976991 is about 1049.1987813659.

The spelling of 1154976991 in words is "one billion, one hundred fifty-four million, nine hundred seventy-six thousand, nine hundred ninety-one".