86623769 has 2 divisors, whose sum is σ = 86623770. Its totient is φ = 86623768.

The previous prime is 86623759. The next prime is 86623787. The reversal of 86623769 is 96732668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67158025 + 19465744 = 8195^2 + 4412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86623769 is a prime.

It is a super-2 number, since 2×86623769² = 15007354711530722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86623709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43311884 + 43311885.

It is an arithmetic number, because the mean of its divisors is an integer number (43311885).

Almost surely, 2^86623769 is an apocalyptic number.

It is an amenable number.

86623769 is a deficient number, since it is larger than the sum of its proper divisors (1).

86623769 is an equidigital number, since it uses as much as digits as its factorization.

86623769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The square root of 86623769 is about 9307.1891030536. The cubic root of 86623769 is about 442.4651045503.

The spelling of 86623769 in words is "eighty-six million, six hundred twenty-three thousand, seven hundred sixty-nine".