86192739421 has 2 divisors, whose sum is σ = 86192739422. Its totient is φ = 86192739420.

The previous prime is 86192739377. The next prime is 86192739461. The reversal of 86192739421 is 12493729168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86192739396 + 25 = 293586^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 86192739421 - 2²⁷ = 86058521693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86192739461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43096369710 + 43096369711.

It is an arithmetic number, because the mean of its divisors is an integer number (43096369711).

Almost surely, 2^86192739421 is an apocalyptic number.

It is an amenable number.

86192739421 is a deficient number, since it is larger than the sum of its proper divisors (1).

86192739421 is an equidigital number, since it uses as much as digits as its factorization.

86192739421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The spelling of 86192739421 in words is "eighty-six billion, one hundred ninety-two million, seven hundred thirty-nine thousand, four hundred twenty-one".