71690207 has 6 divisors (see below), whose sum is σ = 76155648. Its totient is φ = 67472864.

The previous prime is 71690167. The next prime is 71690219. The reversal of 71690207 is 70209617.

It is not a de Polignac number, because 71690207 - 2⁸ = 71689951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71690237) 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 in 5 ways as a sum of consecutive naturals, for example, 123743 + ... + 124320.

It is an arithmetic number, because the mean of its divisors is an integer number (12692608).

Almost surely, 2^71690207 is an apocalyptic number.

71690207 is a deficient number, since it is larger than the sum of its proper divisors (4465441).

71690207 is a wasteful number, since it uses less digits than its factorization.

71690207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248097 (or 248080 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 71690207 is about 8467.0069682267. The cubic root of 71690207 is about 415.4192443950.

The spelling of 71690207 in words is "seventy-one million, six hundred ninety thousand, two hundred seven".