53989749 has 24 divisors (see below), whose sum is σ = 86284224. Its totient is φ = 32256000.

The previous prime is 53989723. The next prime is 53989751. The reversal of 53989749 is 94798935.

It is not a de Polignac number, because 53989749 - 2¹¹ = 53987701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53989695 and 53989704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53989709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3189 + ... + 10869.

It is an arithmetic number, because the mean of its divisors is an integer number (3595176).

Almost surely, 2^53989749 is an apocalyptic number.

It is an amenable number.

53989749 is a deficient number, since it is larger than the sum of its proper divisors (32294475).

53989749 is a wasteful number, since it uses less digits than its factorization.

53989749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7769 (or 7766 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 53989749 is about 7347.7717030403. The cubic root of 53989749 is about 377.9523959536.

The spelling of 53989749 in words is "fifty-three million, nine hundred eighty-nine thousand, seven hundred forty-nine".