73919749 has 4 divisors (see below), whose sum is σ = 74025900. Its totient is φ = 73813600.

The previous prime is 73919737. The next prime is 73919777. The reversal of 73919749 is 94791937.

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: 94791937 = 59 ⋅1606643.

It can be written as a sum of positive squares in 2 ways, for example, as 47858724 + 26061025 = 6918^2 + 5105^2 .

It is a cyclic number.

It is not a de Polignac number, because 73919749 - 2¹³ = 73911557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73919849) 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, 52024 + ... + 53425.

It is an arithmetic number, because the mean of its divisors is an integer number (18506475).

Almost surely, 2^73919749 is an apocalyptic number.

It is an amenable number.

73919749 is a deficient number, since it is larger than the sum of its proper divisors (106151).

73919749 is a wasteful number, since it uses less digits than its factorization.

73919749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106150.

The product of its digits is 428652, while the sum is 49.

The square root of 73919749 is about 8597.6595070984. The cubic root of 73919749 is about 419.6818244052.

The spelling of 73919749 in words is "seventy-three million, nine hundred nineteen thousand, seven hundred forty-nine".