61973 has 4 divisors (see below), whose sum is σ = 64140. Its totient is φ = 59808.

The previous prime is 61967. The next prime is 61979. The reversal of 61973 is 37916.

It is a happy number.

61973 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.

It is an interprime number because it is at equal distance from previous prime (61967) and next prime (61979).

It can be written as a sum of positive squares in 2 ways, for example, as 14884 + 47089 = 122^2 + 217^2 .

It is a cyclic number.

It is not a de Polignac number, because 61973 - 2⁶ = 61909 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61979) 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, 1040 + ... + 1097.

It is an arithmetic number, because the mean of its divisors is an integer number (16035).

2⁶¹⁹⁷³ is an apocalyptic number.

It is an amenable number.

61973 is a deficient number, since it is larger than the sum of its proper divisors (2167).

61973 is a wasteful number, since it uses less digits than its factorization.

61973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166.

The product of its digits is 1134, while the sum is 26.

The square root of 61973 is about 248.9437687511. The cubic root of 61973 is about 39.5731699361.

The spelling of 61973 in words is "sixty-one thousand, nine hundred seventy-three".