85949147 has 2 divisors, whose sum is σ = 85949148. Its totient is φ = 85949146.

The previous prime is 85949111. The next prime is 85949153. The reversal of 85949147 is 74194958.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85949147 is a prime.

It is not a weakly prime, because it can be changed into another prime (85949107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42974573 + 42974574.

It is an arithmetic number, because the mean of its divisors is an integer number (42974574).

Almost surely, 2^85949147 is an apocalyptic number.

85949147 is a deficient number, since it is larger than the sum of its proper divisors (1).

85949147 is an equidigital number, since it uses as much as digits as its factorization.

85949147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 85949147 is about 9270.8762800503. The cubic root of 85949147 is about 441.3134769992.

The spelling of 85949147 in words is "eighty-five million, nine hundred forty-nine thousand, one hundred forty-seven".