86494489 has 2 divisors, whose sum is σ = 86494490. Its totient is φ = 86494488.

The previous prime is 86494451. The next prime is 86494511. The reversal of 86494489 is 98449468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86490000 + 4489 = 9300^2 + 67^2 .

It is a cyclic number.

It is not a de Polignac number, because 86494489 - 2⁷ = 86494361 is a prime.

It is a super-2 number, since 2×86494489² = 14962593254742242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86474489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43247244 + 43247245.

It is an arithmetic number, because the mean of its divisors is an integer number (43247245).

Almost surely, 2^86494489 is an apocalyptic number.

It is an amenable number.

86494489 is a deficient number, since it is larger than the sum of its proper divisors (1).

86494489 is an equidigital number, since it uses as much as digits as its factorization.

86494489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 52.

The square root of 86494489 is about 9300.2413409545. The cubic root of 86494489 is about 442.2448787408.

It can be divided in two parts, 8649 and 4489, that multiplied together give a square (38825361 = 6231²).

The spelling of 86494489 in words is "eighty-six million, four hundred ninety-four thousand, four hundred eighty-nine".