86192739397 has 6 divisors (see below), whose sum is σ = 91561145618. Its totient is φ = 81122577984.

The previous prime is 86192739377. The next prime is 86192739421. The reversal of 86192739397 is 79393729168.

It is a happy number.

It is a Cunningham number, because it is equal to 293586²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 26749910916 + 59442828481 = 163554^2 + 243809^2 .

It is not a de Polignac number, because 86192739397 - 2¹⁵ = 86192706629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86192739317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 149122098 + ... + 149122675.

Almost surely, 2^86192739397 is an apocalyptic number.

It is an amenable number.

86192739397 is a deficient number, since it is larger than the sum of its proper divisors (5368406221).

86192739397 is a wasteful number, since it uses less digits than its factorization.

86192739397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298244807 (or 298244790 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 64.

The spelling of 86192739397 in words is "eighty-six billion, one hundred ninety-two million, seven hundred thirty-nine thousand, three hundred ninety-seven".