16379999 has 2 divisors, whose sum is σ = 16380000. Its totient is φ = 16379998.

The previous prime is 16379989. The next prime is 16380029. The reversal of 16379999 is 99997361.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16379999 is a prime.

It is a Sophie Germain prime.

16379999 is a modest number, since divided by 9999 gives 1637 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 16379999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16379929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8189999 + 8190000.

It is an arithmetic number, because the mean of its divisors is an integer number (8190000).

Almost surely, 2^16379999 is an apocalyptic number.

16379999 is a deficient number, since it is larger than the sum of its proper divisors (1).

16379999 is an equidigital number, since it uses as much as digits as its factorization.

16379999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 826686, while the sum is 53.

The square root of 16379999 is about 4047.2211454281. The cubic root of 16379999 is about 253.9634921799.

The spelling of 16379999 in words is "sixteen million, three hundred seventy-nine thousand, nine hundred ninety-nine".