55701989 has 4 divisors (see below), whose sum is σ = 63659424. Its totient is φ = 47744556.

The previous prime is 55701973. The next prime is 55702007. The reversal of 55701989 is 98910755.

It is a happy number.

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 55701989 - 2⁴ = 55701973 is a prime.

It is a super-2 number, since 2×55701989² = 6205423157112242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55701089) 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, 3978707 + ... + 3978720.

It is an arithmetic number, because the mean of its divisors is an integer number (15914856).

Almost surely, 2^55701989 is an apocalyptic number.

It is an amenable number.

55701989 is a deficient number, since it is larger than the sum of its proper divisors (7957435).

55701989 is an equidigital number, since it uses as much as digits as its factorization.

55701989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7957434.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 55701989 is about 7463.3765146882. The cubic root of 55701989 is about 381.9063689640.

The spelling of 55701989 in words is "fifty-five million, seven hundred one thousand, nine hundred eighty-nine".