53897861 has 4 divisors (see below), whose sum is σ = 55044672. Its totient is φ = 52751052.

The previous prime is 53897849. The next prime is 53897869. The reversal of 53897861 is 16879835.

It is a happy number.

53897861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53897861 - 2⁶ = 53897797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 1146763 = 53897861 / (5 + 3 + 8 + 9 + 7 + 8 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53897869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573335 + ... + 573428.

It is an arithmetic number, because the mean of its divisors is an integer number (13761168).

Almost surely, 2^53897861 is an apocalyptic number.

It is an amenable number.

53897861 is a deficient number, since it is larger than the sum of its proper divisors (1146811).

53897861 is a wasteful number, since it uses less digits than its factorization.

53897861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146810.

The product of its digits is 362880, while the sum is 47.

The square root of 53897861 is about 7341.5162602830. The cubic root of 53897861 is about 377.7378551590.

The spelling of 53897861 in words is "fifty-three million, eight hundred ninety-seven thousand, eight hundred sixty-one".