3994973137 has 2 divisors, whose sum is σ = 3994973138. Its totient is φ = 3994973136.

The previous prime is 3994973119. The next prime is 3994973149. The reversal of 3994973137 is 7313794993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3691656081 + 303317056 = 60759^2 + 17416^2 .

It is a cyclic number.

It is not a de Polignac number, because 3994973137 - 2⁷ = 3994973009 is a prime.

It is not a weakly prime, because it can be changed into another prime (3994973167) 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, 1997486568 + 1997486569.

It is an arithmetic number, because the mean of its divisors is an integer number (1997486569).

Almost surely, 2^3994973137 is an apocalyptic number.

It is an amenable number.

3994973137 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994973137 is an equidigital number, since it uses as much as digits as its factorization.

3994973137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3857868, while the sum is 55.

The square root of 3994973137 is about 63205.7998683665. The cubic root of 3994973137 is about 1586.7358025793.

The spelling of 3994973137 in words is "three billion, nine hundred ninety-four million, nine hundred seventy-three thousand, one hundred thirty-seven".