71690535 has 64 divisors (see below), whose sum is σ = 147225600. Its totient is φ = 32420736.

The previous prime is 71690527. The next prime is 71690539. The reversal of 71690535 is 53509617.

It is a happy number.

It is not a de Polignac number, because 71690535 - 2³ = 71690527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71690535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71690539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 100761 + ... + 101469.

It is an arithmetic number, because the mean of its divisors is an integer number (2300400).

Almost surely, 2^71690535 is an apocalyptic number.

71690535 is an abundant number, since it is smaller than the sum of its proper divisors (75535065).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71690535 is a wasteful number, since it uses less digits than its factorization.

71690535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 71690535 is about 8467.0263375048. The cubic root of 71690535 is about 415.4198779419.

The spelling of 71690535 in words is "seventy-one million, six hundred ninety thousand, five hundred thirty-five".