3999992251 has 2 divisors, whose sum is σ = 3999992252. Its totient is φ = 3999992250.

The previous prime is 3999992219. The next prime is 3999992287. The reversal of 3999992251 is 1522999993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3999992251 - 2⁵ = 3999992219 is a prime.

It is not a weakly prime, because it can be changed into another prime (3999992291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999996125 + 1999996126.

It is an arithmetic number, because the mean of its divisors is an integer number (1999996126).

Almost surely, 2^3999992251 is an apocalyptic number.

3999992251 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999992251 is an equidigital number, since it uses as much as digits as its factorization.

3999992251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3542940, while the sum is 58.

The square root of 3999992251 is about 63245.4919421139. The cubic root of 3999992251 is about 1587.4000269033.

The spelling of 3999992251 in words is "three billion, nine hundred ninety-nine million, nine hundred ninety-two thousand, two hundred fifty-one".