168815047 has 2 divisors, whose sum is σ = 168815048. Its totient is φ = 168815046.

The previous prime is 168815029. The next prime is 168815069. The reversal of 168815047 is 740518861.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168815047 is a prime.

It is a super-2 number, since 2×168815047² = 56997040187224418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168815447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84407523 + 84407524.

It is an arithmetic number, because the mean of its divisors is an integer number (84407524).

Almost surely, 2^168815047 is an apocalyptic number.

168815047 is a deficient number, since it is larger than the sum of its proper divisors (1).

168815047 is an equidigital number, since it uses as much as digits as its factorization.

168815047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 168815047 is about 12992.8844757429. The cubic root of 168815047 is about 552.6757186963.

The spelling of 168815047 in words is "one hundred sixty-eight million, eight hundred fifteen thousand, forty-seven".