55904397 has 8 divisors (see below), whose sum is σ = 75236256. Its totient is φ = 36921072.

The previous prime is 55904369. The next prime is 55904399. The reversal of 55904397 is 79340955.

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

It is not a de Polignac number, because 55904397 - 2⁶ = 55904333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55904399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86758 + ... + 87399.

It is an arithmetic number, because the mean of its divisors is an integer number (9404532).

Almost surely, 2^55904397 is an apocalyptic number.

It is an amenable number.

55904397 is a deficient number, since it is larger than the sum of its proper divisors (19331859).

55904397 is a wasteful number, since it uses less digits than its factorization.

55904397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174267.

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 55904397 is about 7476.9243008071. The cubic root of 55904397 is about 382.3683959229.

The spelling of 55904397 in words is "fifty-five million, nine hundred four thousand, three hundred ninety-seven".