61769 has 4 divisors (see below), whose sum is σ = 65040. Its totient is φ = 58500.

The previous prime is 61757. The next prime is 61781. The reversal of 61769 is 96716.

It is a happy number.

61769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (61757) and next prime (61781).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61769 is a prime.

It is a super-2 number, since 2×61769² = 7630818722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (61729) 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, 1607 + ... + 1644.

It is an arithmetic number, because the mean of its divisors is an integer number (16260).

2⁶¹⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

61769 is a deficient number, since it is larger than the sum of its proper divisors (3271).

61769 is a wasteful number, since it uses less digits than its factorization.

61769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3270.

The product of its digits is 2268, while the sum is 29.

The square root of 61769 is about 248.5336999282. The cubic root of 61769 is about 39.5297004631.

It can be divided in two parts, 617 and 69, that added together give a palindrome (686).

The spelling of 61769 in words is "sixty-one thousand, seven hundred sixty-nine".