55990769 has 4 divisors (see below), whose sum is σ = 56225280. Its totient is φ = 55756260.

The previous prime is 55990751. The next prime is 55990787. The reversal of 55990769 is 96709955.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96709955 = 5 ⋅19341991.

It is an interprime number because it is at equal distance from previous prime (55990751) and next prime (55990787).

It is a cyclic number.

It is not a de Polignac number, because 55990769 - 2⁸ = 55990513 is a prime.

It is a super-2 number, since 2×55990769² = 6269932426422722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55990799) 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, 116897 + ... + 117374.

It is an arithmetic number, because the mean of its divisors is an integer number (14056320).

Almost surely, 2^55990769 is an apocalyptic number.

It is an amenable number.

55990769 is a deficient number, since it is larger than the sum of its proper divisors (234511).

55990769 is a wasteful number, since it uses less digits than its factorization.

55990769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234510.

The product of its (nonzero) digits is 765450, while the sum is 50.

The square root of 55990769 is about 7482.6979759977. The cubic root of 55990769 is about 382.5652136520.

The spelling of 55990769 in words is "fifty-five million, nine hundred ninety thousand, seven hundred sixty-nine".