2139417971 has 2 divisors, whose sum is σ = 2139417972. Its totient is φ = 2139417970.

The previous prime is 2139417967. The next prime is 2139417983. The reversal of 2139417971 is 1797149312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2139417971 - 2² = 2139417967 is a prime.

It is not a weakly prime, because it can be changed into another prime (2139417671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069708985 + 1069708986.

It is an arithmetic number, because the mean of its divisors is an integer number (1069708986).

Almost surely, 2^2139417971 is an apocalyptic number.

2139417971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139417971 is an equidigital number, since it uses as much as digits as its factorization.

2139417971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 44.

The square root of 2139417971 is about 46253.8427700878. The cubic root of 2139417971 is about 1288.5419037934.

The spelling of 2139417971 in words is "two billion, one hundred thirty-nine million, four hundred seventeen thousand, nine hundred seventy-one".