74212847 has 2 divisors, whose sum is σ = 74212848. Its totient is φ = 74212846.

The previous prime is 74212843. The next prime is 74212849. The reversal of 74212847 is 74821247.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74212847 - 2² = 74212843 is a prime.

Together with 74212849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74212843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37106423 + 37106424.

It is an arithmetic number, because the mean of its divisors is an integer number (37106424).

Almost surely, 2^74212847 is an apocalyptic number.

74212847 is a deficient number, since it is larger than the sum of its proper divisors (1).

74212847 is an equidigital number, since it uses as much as digits as its factorization.

74212847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 35.

The square root of 74212847 is about 8614.6878643396. The cubic root of 74212847 is about 420.2357840859.

Subtracting 74212847 from its reverse (74821247), we obtain a square (608400 = 780²).

The spelling of 74212847 in words is "seventy-four million, two hundred twelve thousand, eight hundred forty-seven".