53989747 has 4 divisors (see below), whose sum is σ = 61702576. Its totient is φ = 46276920.

The previous prime is 53989723. The next prime is 53989751. The reversal of 53989747 is 74798935.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53989747 is a prime.

It is a super-2 number, since 2×53989747² = 5829785562248018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53989694 and 53989703.

It is not an unprimeable number, because it can be changed into a prime (53989777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3856404 + ... + 3856417.

It is an arithmetic number, because the mean of its divisors is an integer number (15425644).

Almost surely, 2^53989747 is an apocalyptic number.

53989747 is a deficient number, since it is larger than the sum of its proper divisors (7712829).

53989747 is an equidigital number, since it uses as much as digits as its factorization.

53989747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712828.

The product of its digits is 1905120, while the sum is 52.

The square root of 53989747 is about 7347.7715669446. The cubic root of 53989747 is about 377.9523912866.

The spelling of 53989747 in words is "fifty-three million, nine hundred eighty-nine thousand, seven hundred forty-seven".