2391489349279 has 4 divisors (see below), whose sum is σ = 2449818357840. Its totient is φ = 2333160340720.

The previous prime is 2391489349273. The next prime is 2391489349307. The reversal of 2391489349279 is 9729439841932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2391489349279 is a prime.

It is a super-3 number, since 3×2391489349279³ (a number of 38 digits) contains 333 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 (2391489349273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29164504219 + ... + 29164504300.

It is an arithmetic number, because the mean of its divisors is an integer number (612454589460).

Almost surely, 2^{2391489349279} is an apocalyptic number.

2391489349279 is a deficient number, since it is larger than the sum of its proper divisors (58329008561).

2391489349279 is an equidigital number, since it uses as much as digits as its factorization.

2391489349279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58329008560.

The product of its digits is 211631616, while the sum is 70.

The spelling of 2391489349279 in words is "two trillion, three hundred ninety-one billion, four hundred eighty-nine million, three hundred forty-nine thousand, two hundred seventy-nine".