74442197 has 2 divisors, whose sum is σ = 74442198. Its totient is φ = 74442196.

The previous prime is 74442161. The next prime is 74442211. The reversal of 74442197 is 79124447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60855601 + 13586596 = 7801^2 + 3686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74442197 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74442197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74442127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37221098 + 37221099.

It is an arithmetic number, because the mean of its divisors is an integer number (37221099).

Almost surely, 2^74442197 is an apocalyptic number.

It is an amenable number.

74442197 is a deficient number, since it is larger than the sum of its proper divisors (1).

74442197 is an equidigital number, since it uses as much as digits as its factorization.

74442197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 38.

The square root of 74442197 is about 8627.9891631828. The cubic root of 74442197 is about 420.6682427262.

The spelling of 74442197 in words is "seventy-four million, four hundred forty-two thousand, one hundred ninety-seven".