55459387 has 4 divisors (see below), whose sum is σ = 55494400. Its totient is φ = 55424376.

The previous prime is 55459373. The next prime is 55459399. The reversal of 55459387 is 78395455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78395455 = 5 ⋅15679091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55459387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55459357) 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, 15012 + ... + 18337.

It is an arithmetic number, because the mean of its divisors is an integer number (13873600).

Almost surely, 2^55459387 is an apocalyptic number.

55459387 is a deficient number, since it is larger than the sum of its proper divisors (35013).

55459387 is a wasteful number, since it uses less digits than its factorization.

55459387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35012.

The product of its digits is 756000, while the sum is 46.

The square root of 55459387 is about 7447.1059479505. The cubic root of 55459387 is about 381.3511159905.

The spelling of 55459387 in words is "fifty-five million, four hundred fifty-nine thousand, three hundred eighty-seven".