71497207 has 2 divisors, whose sum is σ = 71497208. Its totient is φ = 71497206.

The previous prime is 71497201. The next prime is 71497243. The reversal of 71497207 is 70279417.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71497207 - 2¹¹ = 71495159 is a prime.

It is a super-2 number, since 2×71497207² = 10223701217601698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71497201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35748603 + 35748604.

It is an arithmetic number, because the mean of its divisors is an integer number (35748604).

Almost surely, 2^71497207 is an apocalyptic number.

71497207 is a deficient number, since it is larger than the sum of its proper divisors (1).

71497207 is an equidigital number, since it uses as much as digits as its factorization.

71497207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 71497207 is about 8455.6021074788. The cubic root of 71497207 is about 415.0461205819.

The spelling of 71497207 in words is "seventy-one million, four hundred ninety-seven thousand, two hundred seven".