85770983 has 2 divisors, whose sum is σ = 85770984. Its totient is φ = 85770982.

The previous prime is 85770973. The next prime is 85771003. The reversal of 85770983 is 38907758.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85770983 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85770943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42885491 + 42885492.

It is an arithmetic number, because the mean of its divisors is an integer number (42885492).

Almost surely, 2^85770983 is an apocalyptic number.

85770983 is a deficient number, since it is larger than the sum of its proper divisors (1).

85770983 is an equidigital number, since it uses as much as digits as its factorization.

85770983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 85770983 is about 9261.2624949302. The cubic root of 85770983 is about 441.0083331330.

The spelling of 85770983 in words is "eighty-five million, seven hundred seventy thousand, nine hundred eighty-three".