2991949425 has 36 divisors (see below), whose sum is σ = 5674151340. Its totient is φ = 1501839360.

The previous prime is 2991949409. The next prime is 2991949427. The reversal of 2991949425 is 5249491992.

2991949425 is a `hidden beast` number, since 29 + 9 + 194 + 9 + 425 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 277122609 + 2714826816 = 16647^2 + 52104^2 .

It is not a de Polignac number, because 2991949425 - 2⁴ = 2991949409 is a prime.

It is a super-2 number, since 2×2991949425² = 17903522723515661250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2991949427) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 387280 + ... + 394929.

It is an arithmetic number, because the mean of its divisors is an integer number (157615315).

Almost surely, 2^2991949425 is an apocalyptic number.

2991949425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2991949425 is a deficient number, since it is larger than the sum of its proper divisors (2682201915).

2991949425 is a wasteful number, since it uses less digits than its factorization.

2991949425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782242 (or 782234 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 2991949425 is about 54698.7150214701. The cubic root of 2991949425 is about 1440.9583103155.

The spelling of 2991949425 in words is "two billion, nine hundred ninety-one million, nine hundred forty-nine thousand, four hundred twenty-five".