74218253 has 2 divisors, whose sum is σ = 74218254. Its totient is φ = 74218252.

The previous prime is 74218219. The next prime is 74218271. The reversal of 74218253 is 35281247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73222249 + 996004 = 8557^2 + 998^2 .

It is an emirp because it is prime and its reverse (35281247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74218253 - 2¹² = 74214157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74218553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37109126 + 37109127.

It is an arithmetic number, because the mean of its divisors is an integer number (37109127).

Almost surely, 2^74218253 is an apocalyptic number.

It is an amenable number.

74218253 is a deficient number, since it is larger than the sum of its proper divisors (1).

74218253 is an equidigital number, since it uses as much as digits as its factorization.

74218253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 74218253 is about 8615.0016250724. The cubic root of 74218253 is about 420.2459877977.

The spelling of 74218253 in words is "seventy-four million, two hundred eighteen thousand, two hundred fifty-three".