53998765 has 8 divisors (see below), whose sum is σ = 64838520. Its totient is φ = 43172352.

The previous prime is 53998753. The next prime is 53998771. The reversal of 53998765 is 56789935.

It can be written as a sum of positive squares in 4 ways, for example, as 3261636 + 50737129 = 1806^2 + 7123^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53998765 - 2¹⁵ = 53965997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11941 + ... + 15829.

It is an arithmetic number, because the mean of its divisors is an integer number (8104815).

Almost surely, 2^53998765 is an apocalyptic number.

It is an amenable number.

53998765 is a deficient number, since it is larger than the sum of its proper divisors (10839755).

53998765 is a wasteful number, since it uses less digits than its factorization.

53998765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6671.

The product of its digits is 2041200, while the sum is 52.

The square root of 53998765 is about 7348.3851967626. The cubic root of 53998765 is about 377.9734334604.

The spelling of 53998765 in words is "fifty-three million, nine hundred ninety-eight thousand, seven hundred sixty-five".