399129236951 has 2 divisors, whose sum is σ = 399129236952. Its totient is φ = 399129236950.

The previous prime is 399129236927. The next prime is 399129236963. The reversal of 399129236951 is 159632921993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399129236951 - 2³⁰ = 398055495127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399129236981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199564618475 + 199564618476.

It is an arithmetic number, because the mean of its divisors is an integer number (199564618476).

Almost surely, 2^399129236951 is an apocalyptic number.

399129236951 is a deficient number, since it is larger than the sum of its proper divisors (1).

399129236951 is an equidigital number, since it uses as much as digits as its factorization.

399129236951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7085880, while the sum is 59.

The spelling of 399129236951 in words is "three hundred ninety-nine billion, one hundred twenty-nine million, two hundred thirty-six thousand, nine hundred fifty-one".