1163749251 has 8 divisors (see below), whose sum is σ = 1773332224. Its totient is φ = 664999560.

The previous prime is 1163749241. The next prime is 1163749253. The reversal of 1163749251 is 1529473611.

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

It is not a de Polignac number, because 1163749251 - 2²² = 1159554947 is a prime.

It is a super-2 number, since 2×1163749251² = 2708624638406122002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163749253) 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, 27708295 + ... + 27708336.

It is an arithmetic number, because the mean of its divisors is an integer number (221666528).

Almost surely, 2^1163749251 is an apocalyptic number.

1163749251 is a deficient number, since it is larger than the sum of its proper divisors (609582973).

1163749251 is an equidigital number, since it uses as much as digits as its factorization.

1163749251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55416641.

The product of its digits is 45360, while the sum is 39.

The square root of 1163749251 is about 34113.7692288612. The cubic root of 1163749251 is about 1051.8483697061.

The spelling of 1163749251 in words is "one billion, one hundred sixty-three million, seven hundred forty-nine thousand, two hundred fifty-one".