74021279 has 2 divisors, whose sum is σ = 74021280. Its totient is φ = 74021278.

The previous prime is 74021267. The next prime is 74021293. The reversal of 74021279 is 97212047.

It is a weak prime.

It is an emirp because it is prime and its reverse (97212047) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74021279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74027279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37010639 + 37010640.

It is an arithmetic number, because the mean of its divisors is an integer number (37010640).

Almost surely, 2^74021279 is an apocalyptic number.

74021279 is a deficient number, since it is larger than the sum of its proper divisors (1).

74021279 is an equidigital number, since it uses as much as digits as its factorization.

74021279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 74021279 is about 8603.5619948949. The cubic root of 74021279 is about 419.8738831465.

The spelling of 74021279 in words is "seventy-four million, twenty-one thousand, two hundred seventy-nine".