85293731 has 2 divisors, whose sum is σ = 85293732. Its totient is φ = 85293730.

The previous prime is 85293721. The next prime is 85293737. The reversal of 85293731 is 13739258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85293731 - 2¹⁰ = 85292707 is a prime.

It is a super-2 number, since 2×85293731² = 14550041095800722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (85293737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42646865 + 42646866.

It is an arithmetic number, because the mean of its divisors is an integer number (42646866).

Almost surely, 2^85293731 is an apocalyptic number.

85293731 is a deficient number, since it is larger than the sum of its proper divisors (1).

85293731 is an equidigital number, since it uses as much as digits as its factorization.

85293731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 85293731 is about 9235.4605191079. The cubic root of 85293731 is about 440.1888497185.

The spelling of 85293731 in words is "eighty-five million, two hundred ninety-three thousand, seven hundred thirty-one".