86989157 has 2 divisors, whose sum is σ = 86989158. Its totient is φ = 86989156.

The previous prime is 86989139. The next prime is 86989159. The reversal of 86989157 is 75198968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86007076 + 982081 = 9274^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 86989157 - 2¹² = 86985061 is a prime.

It is a super-2 number, since 2×86989157² = 15134226871141298, which contains 22 as substring.

Together with 86989159, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 86989099 and 86989108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86989159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43494578 + 43494579.

It is an arithmetic number, because the mean of its divisors is an integer number (43494579).

Almost surely, 2^86989157 is an apocalyptic number.

It is an amenable number.

86989157 is a deficient number, since it is larger than the sum of its proper divisors (1).

86989157 is an equidigital number, since it uses as much as digits as its factorization.

86989157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 53.

The square root of 86989157 is about 9326.7977891664. The cubic root of 86989157 is about 443.0863530331.

The spelling of 86989157 in words is "eighty-six million, nine hundred eighty-nine thousand, one hundred fifty-seven".