1361999 has 2 divisors, whose sum is σ = 1362000. Its totient is φ = 1361998.

The previous prime is 1361963. The next prime is 1362017. The reversal of 1361999 is 9991631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1361999 - 2⁸ = 1361743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680999 + 681000.

It is an arithmetic number, because the mean of its divisors is an integer number (681000).

2^1361999 is an apocalyptic number.

1361999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361999 is an equidigital number, since it uses as much as digits as its factorization.

1361999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13122, while the sum is 38.

The square root of 1361999 is about 1167.0471284400. The cubic root of 1361999 is about 110.8474217805.

The spelling of 1361999 in words is "one million, three hundred sixty-one thousand, nine hundred ninety-nine".