53956639 has 4 divisors (see below), whose sum is σ = 58861800. Its totient is φ = 49051480.

The previous prime is 53956613. The next prime is 53956649. The reversal of 53956639 is 93665935.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 53956639 - 2⁹ = 53956127 is a prime.

It is a super-2 number, since 2×53956639² = 5822637784352642, 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 (53956649) 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, 2452564 + ... + 2452585.

It is an arithmetic number, because the mean of its divisors is an integer number (14715450).

Almost surely, 2^53956639 is an apocalyptic number.

53956639 is a deficient number, since it is larger than the sum of its proper divisors (4905161).

53956639 is a wasteful number, since it uses less digits than its factorization.

53956639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4905160.

The product of its digits is 656100, while the sum is 46.

The square root of 53956639 is about 7345.5182934903. The cubic root of 53956639 is about 377.8751185502.

The spelling of 53956639 in words is "fifty-three million, nine hundred fifty-six thousand, six hundred thirty-nine".