156873947 has 2 divisors, whose sum is σ = 156873948. Its totient is φ = 156873946.

The previous prime is 156873923. The next prime is 156873949. The reversal of 156873947 is 749378651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 156873947 - 2¹² = 156869851 is a prime.

Together with 156873949, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 156873895 and 156873904.

It is not a weakly prime, because it can be changed into another prime (156873949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78436973 + 78436974.

It is an arithmetic number, because the mean of its divisors is an integer number (78436974).

Almost surely, 2^156873947 is an apocalyptic number.

156873947 is a deficient number, since it is larger than the sum of its proper divisors (1).

156873947 is an equidigital number, since it uses as much as digits as its factorization.

156873947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 156873947 is about 12524.9330137929. The cubic root of 156873947 is about 539.3246552828.

The spelling of 156873947 in words is "one hundred fifty-six million, eight hundred seventy-three thousand, nine hundred forty-seven".