74457749 has 2 divisors, whose sum is σ = 74457750. Its totient is φ = 74457748.

The previous prime is 74457743. The next prime is 74457767. The reversal of 74457749 is 94775447.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45995524 + 28462225 = 6782^2 + 5335^2 .

It is a cyclic number.

It is not a de Polignac number, because 74457749 - 2²⁰ = 73409173 is a prime.

It is a super-2 number, since 2×74457749² = 11087912772294002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74457743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37228874 + 37228875.

It is an arithmetic number, because the mean of its divisors is an integer number (37228875).

Almost surely, 2^74457749 is an apocalyptic number.

It is an amenable number.

74457749 is a deficient number, since it is larger than the sum of its proper divisors (1).

74457749 is an equidigital number, since it uses as much as digits as its factorization.

74457749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 47.

The square root of 74457749 is about 8628.8903689872. The cubic root of 74457749 is about 420.6975351492.

The spelling of 74457749 in words is "seventy-four million, four hundred fifty-seven thousand, seven hundred forty-nine".