86091257 has 4 divisors (see below), whose sum is σ = 98390016. Its totient is φ = 73792500.

The previous prime is 86091241. The next prime is 86091259. The reversal of 86091257 is 75219068.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86091257 - 2⁴ = 86091241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86091257.

It is not an unprimeable number, because it can be changed into a prime (86091259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6149369 + ... + 6149382.

It is an arithmetic number, because the mean of its divisors is an integer number (24597504).

Almost surely, 2^86091257 is an apocalyptic number.

It is an amenable number.

86091257 is a deficient number, since it is larger than the sum of its proper divisors (12298759).

86091257 is a wasteful number, since it uses less digits than its factorization.

86091257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12298758.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 86091257 is about 9278.5374386268. The cubic root of 86091257 is about 441.5565685146.

The spelling of 86091257 in words is "eighty-six million, ninety-one thousand, two hundred fifty-seven".