5961881987 has 2 divisors, whose sum is σ = 5961881988. Its totient is φ = 5961881986.

The previous prime is 5961881941. The next prime is 5961881993. The reversal of 5961881987 is 7891881695.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5961881987 - 2⁶ = 5961881923 is a prime.

It is not a weakly prime, because it can be changed into another prime (5961881087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2980940993 + 2980940994.

It is an arithmetic number, because the mean of its divisors is an integer number (2980940994).

Almost surely, 2^5961881987 is an apocalyptic number.

5961881987 is a deficient number, since it is larger than the sum of its proper divisors (1).

5961881987 is an equidigital number, since it uses as much as digits as its factorization.

5961881987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 62.

The square root of 5961881987 is about 77213.2241717700. The cubic root of 5961881987 is about 1813.2643580227.

The spelling of 5961881987 in words is "five billion, nine hundred sixty-one million, eight hundred eighty-one thousand, nine hundred eighty-seven".