55961693 has 4 divisors (see below), whose sum is σ = 57017628. Its totient is φ = 54905760.

The previous prime is 55961641. The next prime is 55961699. The reversal of 55961693 is 39616955.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38962564 + 16999129 = 6242^2 + 4123^2 .

It is a cyclic number.

It is not a de Polignac number, because 55961693 - 2¹⁰ = 55960669 is a prime.

It is a super-2 number, since 2×55961693² = 6263422166852498, 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 (55961699) 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, 527888 + ... + 527993.

It is an arithmetic number, because the mean of its divisors is an integer number (14254407).

Almost surely, 2^55961693 is an apocalyptic number.

55961693 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

55961693 is a deficient number, since it is larger than the sum of its proper divisors (1055935).

55961693 is a wasteful number, since it uses less digits than its factorization.

55961693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055934.

The product of its digits is 218700, while the sum is 44.

The square root of 55961693 is about 7480.7548415919. The cubic root of 55961693 is about 382.4989801616.

The spelling of 55961693 in words is "fifty-five million, nine hundred sixty-one thousand, six hundred ninety-three".