1949689719 has 12 divisors (see below), whose sum is σ = 2818136776. Its totient is φ = 1298907792.

The previous prime is 1949689699. The next prime is 1949689723. The reversal of 1949689719 is 9179869491.

It is not a de Polignac number, because 1949689719 - 2²⁷ = 1815471991 is a prime.

It is a super-2 number, since 2×1949689719² = 7602580000748597922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949689739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59692 + ... + 86385.

Almost surely, 2^1949689719 is an apocalyptic number.

1949689719 is a deficient number, since it is larger than the sum of its proper divisors (868447057).

1949689719 is a wasteful number, since it uses less digits than its factorization.

1949689719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147566 (or 147563 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The square root of 1949689719 is about 44155.2909513684. The cubic root of 1949689719 is about 1249.2667099660.

The spelling of 1949689719 in words is "one billion, nine hundred forty-nine million, six hundred eighty-nine thousand, seven hundred nineteen".