85977469 has 2 divisors, whose sum is σ = 85977470. Its totient is φ = 85977468.

The previous prime is 85977467. The next prime is 85977481. The reversal of 85977469 is 96477958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54952569 + 31024900 = 7413^2 + 5570^2 .

It is a cyclic number.

It is not a de Polignac number, because 85977469 - 2¹ = 85977467 is a prime.

It is a super-2 number, since 2×85977469² = 14784250351291922, which contains 22 as substring.

Together with 85977467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85977467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42988734 + 42988735.

It is an arithmetic number, because the mean of its divisors is an integer number (42988735).

Almost surely, 2^85977469 is an apocalyptic number.

It is an amenable number.

85977469 is a deficient number, since it is larger than the sum of its proper divisors (1).

85977469 is an equidigital number, since it uses as much as digits as its factorization.

85977469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 55.

The square root of 85977469 is about 9272.4036258135. The cubic root of 85977469 is about 441.3619456116.

The spelling of 85977469 in words is "eighty-five million, nine hundred seventy-seven thousand, four hundred sixty-nine".