74481779 has 2 divisors, whose sum is σ = 74481780. Its totient is φ = 74481778.

The previous prime is 74481761. The next prime is 74481821. The reversal of 74481779 is 97718447.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74481779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74481739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37240889 + 37240890.

It is an arithmetic number, because the mean of its divisors is an integer number (37240890).

Almost surely, 2^74481779 is an apocalyptic number.

74481779 is a deficient number, since it is larger than the sum of its proper divisors (1).

74481779 is an equidigital number, since it uses as much as digits as its factorization.

74481779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 47.

The square root of 74481779 is about 8630.2826720798. The cubic root of 74481779 is about 420.7427879919.

The spelling of 74481779 in words is "seventy-four million, four hundred eighty-one thousand, seven hundred seventy-nine".