15951959 has 2 divisors, whose sum is σ = 15951960. Its totient is φ = 15951958.

The previous prime is 15951893. The next prime is 15951961. The reversal of 15951959 is 95915951.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15951959 is a prime.

Together with 15951961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15951979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7975979 + 7975980.

It is an arithmetic number, because the mean of its divisors is an integer number (7975980).

Almost surely, 2^15951959 is an apocalyptic number.

15951959 is a deficient number, since it is larger than the sum of its proper divisors (1).

15951959 is an equidigital number, since it uses as much as digits as its factorization.

15951959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91125, while the sum is 44.

The square root of 15951959 is about 3993.9903605292. The cubic root of 15951959 is about 251.7317576957.

The spelling of 15951959 in words is "fifteen million, nine hundred fifty-one thousand, nine hundred fifty-nine".