74418749 has 4 divisors (see below), whose sum is σ = 75077436. Its totient is φ = 73760064.

The previous prime is 74418733. The next prime is 74418761. The reversal of 74418749 is 94781447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94781447 = 613 ⋅154619.

It can be written as a sum of positive squares in 2 ways, for example, as 24108100 + 50310649 = 4910^2 + 7093^2 .

It is a cyclic number.

It is not a de Polignac number, because 74418749 - 2⁴ = 74418733 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74418779) 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, 329174 + ... + 329399.

It is an arithmetic number, because the mean of its divisors is an integer number (18769359).

Almost surely, 2^74418749 is an apocalyptic number.

It is an amenable number.

74418749 is a deficient number, since it is larger than the sum of its proper divisors (658687).

74418749 is a wasteful number, since it uses less digits than its factorization.

74418749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658686.

The product of its digits is 225792, while the sum is 44.

The square root of 74418749 is about 8626.6302227463. The cubic root of 74418749 is about 420.6240703563.

The spelling of 74418749 in words is "seventy-four million, four hundred eighteen thousand, seven hundred forty-nine".