1996739 has 2 divisors, whose sum is σ = 1996740. Its totient is φ = 1996738.

The previous prime is 1996723. The next prime is 1996751. The reversal of 1996739 is 9376991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1996739 - 2⁴ = 1996723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1996739.

It is not a weakly prime, because it can be changed into another prime (1996759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998369 + 998370.

It is an arithmetic number, because the mean of its divisors is an integer number (998370).

2^1996739 is an apocalyptic number.

1996739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996739 is an equidigital number, since it uses as much as digits as its factorization.

1996739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 44.

The square root of 1996739 is about 1413.0601544166. The cubic root of 1996739 is about 125.9235910296.

The spelling of 1996739 in words is "one million, nine hundred ninety-six thousand, seven hundred thirty-nine".