61612237 has 2 divisors, whose sum is σ = 61612238. Its totient is φ = 61612236.

The previous prime is 61612223. The next prime is 61612241. The reversal of 61612237 is 73221616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50282281 + 11329956 = 7091^2 + 3366^2 .

It is a cyclic number.

It is not a de Polignac number, because 61612237 - 2²³ = 53223629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61612277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30806118 + 30806119.

It is an arithmetic number, because the mean of its divisors is an integer number (30806119).

Almost surely, 2^61612237 is an apocalyptic number.

It is an amenable number.

61612237 is a deficient number, since it is larger than the sum of its proper divisors (1).

61612237 is an equidigital number, since it uses as much as digits as its factorization.

61612237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 61612237 is about 7849.3462785126. The cubic root of 61612237 is about 394.9623144093.

The spelling of 61612237 in words is "sixty-one million, six hundred twelve thousand, two hundred thirty-seven".