3961539731 has 2 divisors, whose sum is σ = 3961539732. Its totient is φ = 3961539730.

The previous prime is 3961539677. The next prime is 3961539737. The reversal of 3961539731 is 1379351693.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3961539731 - 2⁶ = 3961539667 is a prime.

It is a super-2 number, since 2×3961539731² = 31387594080583104722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3961539737) by changing a digit.

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, 1980769865 + 1980769866.

It is an arithmetic number, because the mean of its divisors is an integer number (1980769866).

Almost surely, 2^3961539731 is an apocalyptic number.

3961539731 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961539731 is an equidigital number, since it uses as much as digits as its factorization.

3961539731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 47.

The square root of 3961539731 is about 62940.7636671180. The cubic root of 3961539731 is about 1582.2970022966.

The spelling of 3961539731 in words is "three billion, nine hundred sixty-one million, five hundred thirty-nine thousand, seven hundred thirty-one".