85623947 has 2 divisors, whose sum is σ = 85623948. Its totient is φ = 85623946.

The previous prime is 85623943. The next prime is 85623959. The reversal of 85623947 is 74932658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85623947 - 2² = 85623943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85623898 and 85623907.

It is not a weakly prime, because it can be changed into another prime (85623943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42811973 + 42811974.

It is an arithmetic number, because the mean of its divisors is an integer number (42811974).

Almost surely, 2^85623947 is an apocalyptic number.

85623947 is a deficient number, since it is larger than the sum of its proper divisors (1).

85623947 is an equidigital number, since it uses as much as digits as its factorization.

85623947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 85623947 is about 9253.3208633441. The cubic root of 85623947 is about 440.7561841812.

The spelling of 85623947 in words is "eighty-five million, six hundred twenty-three thousand, nine hundred forty-seven".