53978719 has 4 divisors (see below), whose sum is σ = 55720000. Its totient is φ = 52237440.

The previous prime is 53978707. The next prime is 53978731. The reversal of 53978719 is 91787935.

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

It is an interprime number because it is at equal distance from previous prime (53978707) and next prime (53978731).

It is a cyclic number.

It is not a de Polignac number, because 53978719 - 2¹⁹ = 53454431 is a prime.

It is a super-2 number, since 2×53978719² = 5827404209761922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53978789) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 870594 + ... + 870655.

It is an arithmetic number, because the mean of its divisors is an integer number (13930000).

Almost surely, 2^53978719 is an apocalyptic number.

53978719 is a deficient number, since it is larger than the sum of its proper divisors (1741281).

53978719 is a wasteful number, since it uses less digits than its factorization.

53978719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741280.

The product of its digits is 476280, while the sum is 49.

The square root of 53978719 is about 7347.0210970161. The cubic root of 53978719 is about 377.9266558892.

The spelling of 53978719 in words is "fifty-three million, nine hundred seventy-eight thousand, seven hundred nineteen".