86975969 has 2 divisors, whose sum is σ = 86975970. Its totient is φ = 86975968.

The previous prime is 86975953. The next prime is 86976013. The reversal of 86975969 is 96957968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86862400 + 113569 = 9320^2 + 337^2 .

It is a cyclic number.

It is not a de Polignac number, because 86975969 - 2⁴ = 86975953 is a prime.

It is a super-2 number, since 2×86975969² = 15129638366977922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86975909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43487984 + 43487985.

It is an arithmetic number, because the mean of its divisors is an integer number (43487985).

Almost surely, 2^86975969 is an apocalyptic number.

It is an amenable number.

86975969 is a deficient number, since it is larger than the sum of its proper divisors (1).

86975969 is an equidigital number, since it uses as much as digits as its factorization.

86975969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 59.

The square root of 86975969 is about 9326.0907673044. The cubic root of 86975969 is about 443.0639605176.

The spelling of 86975969 in words is "eighty-six million, nine hundred seventy-five thousand, nine hundred sixty-nine".