55391699 has 8 divisors (see below), whose sum is σ = 62376960. Its totient is φ = 48731400.

The previous prime is 55391671. The next prime is 55391723. The reversal of 55391699 is 99619355.

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

It is a cyclic number.

It is not a de Polignac number, because 55391699 - 2¹⁶ = 55326163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55391299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80879 + ... + 81560.

It is an arithmetic number, because the mean of its divisors is an integer number (7797120).

Almost surely, 2^55391699 is an apocalyptic number.

55391699 is a deficient number, since it is larger than the sum of its proper divisors (6985261).

55391699 is a wasteful number, since it uses less digits than its factorization.

55391699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162481.

The product of its digits is 328050, while the sum is 47.

The square root of 55391699 is about 7442.5599762447. The cubic root of 55391699 is about 381.1959069004.

The spelling of 55391699 in words is "fifty-five million, three hundred ninety-one thousand, six hundred ninety-nine".