71473247 has 2 divisors, whose sum is σ = 71473248. Its totient is φ = 71473246.

The previous prime is 71473243. The next prime is 71473277. The reversal of 71473247 is 74237417.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71473247 - 2² = 71473243 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 (71473243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35736623 + 35736624.

It is an arithmetic number, because the mean of its divisors is an integer number (35736624).

Almost surely, 2^71473247 is an apocalyptic number.

71473247 is a deficient number, since it is larger than the sum of its proper divisors (1).

71473247 is an equidigital number, since it uses as much as digits as its factorization.

71473247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32928, while the sum is 35.

The square root of 71473247 is about 8454.1851765856. The cubic root of 71473247 is about 414.9997522619. Note that the first 3 decimals are identical.

The spelling of 71473247 in words is "seventy-one million, four hundred seventy-three thousand, two hundred forty-seven".