71697650 has 12 divisors (see below), whose sum is σ = 133357722. Its totient is φ = 28679040.

The previous prime is 71697649. The next prime is 71697673. The reversal of 71697650 is 5679617.

It can be written as a sum of positive squares in 3 ways, for example, as 40972801 + 30724849 = 6401^2 + 5543^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71697598 and 71697607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 716927 + ... + 717026.

Almost surely, 2^71697650 is an apocalyptic number.

71697650 is a deficient number, since it is larger than the sum of its proper divisors (61660072).

71697650 is a wasteful number, since it uses less digits than its factorization.

71697650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433965 (or 1433960 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 71697650 is about 8467.4464863972. The cubic root of 71697650 is about 415.4336204099.

The spelling of 71697650 in words is "seventy-one million, six hundred ninety-seven thousand, six hundred fifty".