53783661 has 16 divisors (see below), whose sum is σ = 78091200. Its totient is φ = 32796288.

The previous prime is 53783659. The next prime is 53783663. The reversal of 53783661 is 16638735.

It is an interprime number because it is at equal distance from previous prime (53783659) and next prime (53783663).

It is not a de Polignac number, because 53783661 - 2¹ = 53783659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53783663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14616 + ... + 17921.

It is an arithmetic number, because the mean of its divisors is an integer number (4880700).

Almost surely, 2^53783661 is an apocalyptic number.

It is an amenable number.

53783661 is a deficient number, since it is larger than the sum of its proper divisors (24307539).

53783661 is a wasteful number, since it uses less digits than its factorization.

53783661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32588.

The product of its digits is 90720, while the sum is 39.

The square root of 53783661 is about 7333.7344511511. The cubic root of 53783661 is about 377.4708800250.

The spelling of 53783661 in words is "fifty-three million, seven hundred eighty-three thousand, six hundred sixty-one".