867861539 has 2 divisors, whose sum is σ = 867861540. Its totient is φ = 867861538.

The previous prime is 867861451. The next prime is 867861563. The reversal of 867861539 is 935168768.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 867861539 - 2¹² = 867857443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (867891539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433930769 + 433930770.

It is an arithmetic number, because the mean of its divisors is an integer number (433930770).

Almost surely, 2^867861539 is an apocalyptic number.

867861539 is a deficient number, since it is larger than the sum of its proper divisors (1).

867861539 is an equidigital number, since it uses as much as digits as its factorization.

867861539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 867861539 is about 29459.4897953104. The cubic root of 867861539 is about 953.8574602410.

The spelling of 867861539 in words is "eight hundred sixty-seven million, eight hundred sixty-one thousand, five hundred thirty-nine".