85296721 has 2 divisors, whose sum is σ = 85296722. Its totient is φ = 85296720.

The previous prime is 85296709. The next prime is 85296733. The reversal of 85296721 is 12769258.

It is a balanced prime because it is at equal distance from previous prime (85296709) and next prime (85296733).

It can be written as a sum of positive squares in only one way, i.e., 43046721 + 42250000 = 6561^2 + 6500^2 .

It is a cyclic number.

It is not a de Polignac number, because 85296721 - 2⁹ = 85296209 is a prime.

It is a super-2 number, since 2×85296721² = 14551061226703682, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (85296791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42648360 + 42648361.

It is an arithmetic number, because the mean of its divisors is an integer number (42648361).

Almost surely, 2^85296721 is an apocalyptic number.

It is an amenable number.

85296721 is a deficient number, since it is larger than the sum of its proper divisors (1).

85296721 is an equidigital number, since it uses as much as digits as its factorization.

85296721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 85296721 is about 9235.6223937534. The cubic root of 85296721 is about 440.1939933137.

The spelling of 85296721 in words is "eighty-five million, two hundred ninety-six thousand, seven hundred twenty-one".