2491236994 has 4 divisors (see below), whose sum is σ = 3736855494. Its totient is φ = 1245618496.

The previous prime is 2491236983. The next prime is 2491237009. The reversal of 2491236994 is 4996321942.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 2463831769 + 27405225 = 49637^2 + 5235^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622809247 + ... + 622809250.

Almost surely, 2^2491236994 is an apocalyptic number.

2491236994 is a deficient number, since it is larger than the sum of its proper divisors (1245618500).

2491236994 is a wasteful number, since it uses less digits than its factorization.

2491236994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245618499.

The product of its digits is 839808, while the sum is 49.

The square root of 2491236994 is about 49912.2930148476. The cubic root of 2491236994 is about 1355.6211880158.

The spelling of 2491236994 in words is "two billion, four hundred ninety-one million, two hundred thirty-six thousand, nine hundred ninety-four".