2391252749 has 4 divisors (see below), whose sum is σ = 2391620640. Its totient is φ = 2390884860.

The previous prime is 2391252737. The next prime is 2391252763. The reversal of 2391252749 is 9472521932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2391252749 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 (2391282749) 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 3 ways as a sum of consecutive naturals, for example, 174017 + ... + 187254.

It is an arithmetic number, because the mean of its divisors is an integer number (597905160).

Almost surely, 2^2391252749 is an apocalyptic number.

It is an amenable number.

2391252749 is a deficient number, since it is larger than the sum of its proper divisors (367891).

2391252749 is an equidigital number, since it uses as much as digits as its factorization.

2391252749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367890.

The product of its digits is 272160, while the sum is 44.

The square root of 2391252749 is about 48900.4371043859. The cubic root of 2391252749 is about 1337.2373372349.

The spelling of 2391252749 in words is "two billion, three hundred ninety-one million, two hundred fifty-two thousand, seven hundred forty-nine".