61737373 has 2 divisors, whose sum is σ = 61737374. Its totient is φ = 61737372.

The previous prime is 61737371. The next prime is 61737397. The reversal of 61737373 is 37373716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40411449 + 21325924 = 6357^2 + 4618^2 .

It is a cyclic number.

It is not a de Polignac number, because 61737373 - 2¹ = 61737371 is a prime.

It is a super-5 number, since 5×61737373⁵ (a number of 40 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

Together with 61737371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61737371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30868686 + 30868687.

It is an arithmetic number, because the mean of its divisors is an integer number (30868687).

Almost surely, 2^61737373 is an apocalyptic number.

It is an amenable number.

61737373 is a deficient number, since it is larger than the sum of its proper divisors (1).

61737373 is an equidigital number, since it uses as much as digits as its factorization.

61737373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55566, while the sum is 37.

The square root of 61737373 is about 7857.3133449036. The cubic root of 61737373 is about 395.2295263779.

The spelling of 61737373 in words is "sixty-one million, seven hundred thirty-seven thousand, three hundred seventy-three".