861301019 has 2 divisors, whose sum is σ = 861301020. Its totient is φ = 861301018.

The previous prime is 861300961. The next prime is 861301031. The reversal of 861301019 is 910103168.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861301019 - 2²⁸ = 592865563 is a prime.

It is a super-2 number, since 2×861301019² = 1483678890660876722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 861300982 and 861301000.

It is not a weakly prime, because it can be changed into another prime (861301069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430650509 + 430650510.

It is an arithmetic number, because the mean of its divisors is an integer number (430650510).

Almost surely, 2^861301019 is an apocalyptic number.

861301019 is a deficient number, since it is larger than the sum of its proper divisors (1).

861301019 is an equidigital number, since it uses as much as digits as its factorization.

861301019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 861301019 is about 29347.9304040336. The cubic root of 861301019 is about 951.4478454788.

The spelling of 861301019 in words is "eight hundred sixty-one million, three hundred one thousand, nineteen".