91278652 has 6 divisors (see below), whose sum is σ = 159737648. Its totient is φ = 45639324.

The previous prime is 91278643. The next prime is 91278673. The reversal of 91278652 is 25687219.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11409828 + ... + 11409835.

Almost surely, 2^91278652 is an apocalyptic number.

It is an amenable number.

91278652 is a deficient number, since it is larger than the sum of its proper divisors (68458996).

91278652 is a wasteful number, since it uses less digits than its factorization.

91278652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22819667 (or 22819665 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 91278652 is about 9553.9861837874. The cubic root of 91278652 is about 450.2527830779.

The spelling of 91278652 in words is "ninety-one million, two hundred seventy-eight thousand, six hundred fifty-two".