61718233 has 2 divisors, whose sum is σ = 61718234. Its totient is φ = 61718232.

The previous prime is 61718159. The next prime is 61718249. The reversal of 61718233 is 33281716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38601369 + 23116864 = 6213^2 + 4808^2 .

It is a cyclic number.

It is not a de Polignac number, because 61718233 - 2²⁵ = 28163801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61718195 and 61718204.

It is not a weakly prime, because it can be changed into another prime (61718263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30859116 + 30859117.

It is an arithmetic number, because the mean of its divisors is an integer number (30859117).

Almost surely, 2^61718233 is an apocalyptic number.

It is an amenable number.

61718233 is a deficient number, since it is larger than the sum of its proper divisors (1).

61718233 is an equidigital number, since it uses as much as digits as its factorization.

61718233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 61718233 is about 7856.0952769172. The cubic root of 61718233 is about 395.1886787538.

Adding to 61718233 its reverse (33281716), we get a palindrome (94999949).

The spelling of 61718233 in words is "sixty-one million, seven hundred eighteen thousand, two hundred thirty-three".