85408947 has 12 divisors (see below), whose sum is σ = 132858544. Its totient is φ = 52559280.

The previous prime is 85408919. The next prime is 85408963. The reversal of 85408947 is 74980458.

It is not a de Polignac number, because 85408947 - 2¹¹ = 85406899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85408907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 364879 + ... + 365112.

Almost surely, 2^85408947 is an apocalyptic number.

85408947 is a deficient number, since it is larger than the sum of its proper divisors (47449597).

85408947 is a wasteful number, since it uses less digits than its factorization.

85408947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730010 (or 730007 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 85408947 is about 9241.6961105633. The cubic root of 85408947 is about 440.3869650184.

The spelling of 85408947 in words is "eighty-five million, four hundred eight thousand, nine hundred forty-seven".