86629919 has 2 divisors, whose sum is σ = 86629920. Its totient is φ = 86629918.

The previous prime is 86629897. The next prime is 86629927. The reversal of 86629919 is 91992668.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86629919 is a prime.

It is a super-2 number, since 2×86629919² = 15009485731893122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86629969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43314959 + 43314960.

It is an arithmetic number, because the mean of its divisors is an integer number (43314960).

Almost surely, 2^86629919 is an apocalyptic number.

86629919 is a deficient number, since it is larger than the sum of its proper divisors (1).

86629919 is an equidigital number, since it uses as much as digits as its factorization.

86629919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 50.

The square root of 86629919 is about 9307.5194869525. The cubic root of 86629919 is about 442.4755754870.

It can be divided in two parts, 8662 and 9919, that added together give a palindrome (18581).

The spelling of 86629919 in words is "eighty-six million, six hundred twenty-nine thousand, nine hundred nineteen".