749137919 has 4 divisors (see below), whose sum is σ = 749674800. Its totient is φ = 748601040.

The previous prime is 749137901. The next prime is 749137933. The reversal of 749137919 is 919731947.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919731947 = 1129 ⋅814643.

It is a cyclic number.

It is not a de Polignac number, because 749137919 - 2⁸ = 749137663 is a prime.

It is a super-2 number, since 2×749137919² = 1122415243367301122, 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 (749137999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266342 + ... + 269139.

It is an arithmetic number, because the mean of its divisors is an integer number (187418700).

Almost surely, 2^749137919 is an apocalyptic number.

749137919 is a deficient number, since it is larger than the sum of its proper divisors (536881).

749137919 is a wasteful number, since it uses less digits than its factorization.

749137919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536880.

The product of its digits is 428652, while the sum is 50.

The square root of 749137919 is about 27370.3839761155. The cubic root of 749137919 is about 908.2120506998.

The spelling of 749137919 in words is "seven hundred forty-nine million, one hundred thirty-seven thousand, nine hundred nineteen".