53977646 has 4 divisors (see below), whose sum is σ = 80966472. Its totient is φ = 26988822.

The previous prime is 53977631. The next prime is 53977663. The reversal of 53977646 is 64677935.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53977646.

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, 13494410 + ... + 13494413.

It is an arithmetic number, because the mean of its divisors is an integer number (20241618).

Almost surely, 2^53977646 is an apocalyptic number.

53977646 is a deficient number, since it is larger than the sum of its proper divisors (26988826).

53977646 is a wasteful number, since it uses less digits than its factorization.

53977646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26988825.

The product of its digits is 952560, while the sum is 47.

The square root of 53977646 is about 7346.9480738603. The cubic root of 53977646 is about 377.9241517048.

The spelling of 53977646 in words is "fifty-three million, nine hundred seventy-seven thousand, six hundred forty-six".