2491261379 has 16 divisors (see below), whose sum is σ = 2673504288. Its totient is φ = 2313142272.

The previous prime is 2491261369. The next prime is 2491261387. The reversal of 2491261379 is 9731621942.

2491261379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2491261379 - 2¹² = 2491257283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2491261369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553472 + ... + 557954.

It is an arithmetic number, because the mean of its divisors is an integer number (167094018).

Almost surely, 2^2491261379 is an apocalyptic number.

2491261379 is a deficient number, since it is larger than the sum of its proper divisors (182242909).

2491261379 is a wasteful number, since it uses less digits than its factorization.

2491261379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934.

The product of its digits is 163296, while the sum is 44.

The square root of 2491261379 is about 49912.5372927484. The cubic root of 2491261379 is about 1355.6256110815.

The spelling of 2491261379 in words is "two billion, four hundred ninety-one million, two hundred sixty-one thousand, three hundred seventy-nine".