74447231 has 2 divisors, whose sum is σ = 74447232. Its totient is φ = 74447230.

The previous prime is 74447207. The next prime is 74447237. The reversal of 74447231 is 13274447.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74447231 - 2⁶ = 74447167 is a prime.

It is a super-2 number, since 2×74447231² = 11084780407134722, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_4363862 and since 74447231 and 4363862 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74447237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37223615 + 37223616.

It is an arithmetic number, because the mean of its divisors is an integer number (37223616).

Almost surely, 2^74447231 is an apocalyptic number.

74447231 is a deficient number, since it is larger than the sum of its proper divisors (1).

74447231 is an equidigital number, since it uses as much as digits as its factorization.

74447231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 32.

The square root of 74447231 is about 8628.2808832351. The cubic root of 74447231 is about 420.6777247865.

The spelling of 74447231 in words is "seventy-four million, four hundred forty-seven thousand, two hundred thirty-one".