1916749 has 2 divisors, whose sum is σ = 1916750. Its totient is φ = 1916748.

The previous prime is 1916741. The next prime is 1916753. The reversal of 1916749 is 9476191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1822500 + 94249 = 1350^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 1916749 - 2³ = 1916741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1916741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958374 + 958375.

It is an arithmetic number, because the mean of its divisors is an integer number (958375).

2^1916749 is an apocalyptic number.

It is an amenable number.

1916749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916749 is an equidigital number, since it uses as much as digits as its factorization.

1916749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 1916749 is about 1384.4670454727. The cubic root of 1916749 is about 124.2191105181.

The spelling of 1916749 in words is "one million, nine hundred sixteen thousand, seven hundred forty-nine".