1601399 has 2 divisors, whose sum is σ = 1601400. Its totient is φ = 1601398.

The previous prime is 1601389. The next prime is 1601423. The reversal of 1601399 is 9931061.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601399 is a prime.

It is a Sophie Germain 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 (1601309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800699 + 800700.

It is an arithmetic number, because the mean of its divisors is an integer number (800700).

2^1601399 is an apocalyptic number.

1601399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601399 is an equidigital number, since it uses as much as digits as its factorization.

1601399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1601399 is about 1265.4639465429. The cubic root of 1601399 is about 116.9947887712.

The spelling of 1601399 in words is "one million, six hundred one thousand, three hundred ninety-nine".