127999967 has 2 divisors, whose sum is σ = 127999968. Its totient is φ = 127999966.

The previous prime is 127999951. The next prime is 127999981. The reversal of 127999967 is 769999721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 127999967 - 2⁴ = 127999951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127999567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63999983 + 63999984.

It is an arithmetic number, because the mean of its divisors is an integer number (63999984).

Almost surely, 2^127999967 is an apocalyptic number.

127999967 is a deficient number, since it is larger than the sum of its proper divisors (1).

127999967 is an equidigital number, since it uses as much as digits as its factorization.

127999967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3857868, while the sum is 59.

The square root of 127999967 is about 11313.7070405769. The cubic root of 127999967 is about 503.9683766482.

The spelling of 127999967 in words is "one hundred twenty-seven million, nine hundred ninety-nine thousand, nine hundred sixty-seven".