69999947 has 2 divisors, whose sum is σ = 69999948. Its totient is φ = 69999946.

The previous prime is 69999913. The next prime is 69999961. The reversal of 69999947 is 74999996.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69999947 - 2²⁴ = 53222731 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69999947.

It is not a weakly prime, because it can be changed into another prime (69999907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34999973 + 34999974.

It is an arithmetic number, because the mean of its divisors is an integer number (34999974).

Almost surely, 2^69999947 is an apocalyptic number.

69999947 is a deficient number, since it is larger than the sum of its proper divisors (1).

69999947 is an equidigital number, since it uses as much as digits as its factorization.

69999947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9920232, while the sum is 62.

The square root of 69999947 is about 8366.5970979843. The cubic root of 69999947 is about 412.1284259674.

The spelling of 69999947 in words is "sixty-nine million, nine hundred ninety-nine thousand, nine hundred forty-seven".