156999047 has 2 divisors, whose sum is σ = 156999048. Its totient is φ = 156999046.

The previous prime is 156999043. The next prime is 156999053. The reversal of 156999047 is 740999651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 156999047 - 2² = 156999043 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 156998986 and 156999004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156999041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78499523 + 78499524.

It is an arithmetic number, because the mean of its divisors is an integer number (78499524).

Almost surely, 2^156999047 is an apocalyptic number.

156999047 is a deficient number, since it is larger than the sum of its proper divisors (1).

156999047 is an equidigital number, since it uses as much as digits as its factorization.

156999047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 156999047 is about 12529.9260572439. The cubic root of 156999047 is about 539.4679796715.

The spelling of 156999047 in words is "one hundred fifty-six million, nine hundred ninety-nine thousand, forty-seven".