85434997 has 2 divisors, whose sum is σ = 85434998. Its totient is φ = 85434996.

The previous prime is 85434967. The next prime is 85435043. The reversal of 85434997 is 79943458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82428241 + 3006756 = 9079^2 + 1734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85434997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85434997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85434917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42717498 + 42717499.

It is an arithmetic number, because the mean of its divisors is an integer number (42717499).

Almost surely, 2^85434997 is an apocalyptic number.

It is an amenable number.

85434997 is a deficient number, since it is larger than the sum of its proper divisors (1).

85434997 is an equidigital number, since it uses as much as digits as its factorization.

85434997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The square root of 85434997 is about 9243.1053764414. The cubic root of 85434997 is about 440.4317336081.

The spelling of 85434997 in words is "eighty-five million, four hundred thirty-four thousand, nine hundred ninety-seven".