74399777 has 2 divisors, whose sum is σ = 74399778. Its totient is φ = 74399776.

The previous prime is 74399753. The next prime is 74399797. The reversal of 74399777 is 77799347.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73942801 + 456976 = 8599^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 74399777 - 2²⁴ = 57622561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74399737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37199888 + 37199889.

It is an arithmetic number, because the mean of its divisors is an integer number (37199889).

Almost surely, 2^74399777 is an apocalyptic number.

It is an amenable number.

74399777 is a deficient number, since it is larger than the sum of its proper divisors (1).

74399777 is an equidigital number, since it uses as much as digits as its factorization.

74399777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2333772, while the sum is 53.

The square root of 74399777 is about 8625.5305344077. The cubic root of 74399777 is about 420.5883232800.

The spelling of 74399777 in words is "seventy-four million, three hundred ninety-nine thousand, seven hundred seventy-seven".