61843321 has 2 divisors, whose sum is σ = 61843322. Its totient is φ = 61843320.

The previous prime is 61843303. The next prime is 61843349. The reversal of 61843321 is 12334816.

It is an a-pointer prime, because the next prime (61843349) can be obtained adding 61843321 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50694400 + 11148921 = 7120^2 + 3339^2 .

It is a cyclic number.

It is not a de Polignac number, because 61843321 - 2⁵ = 61843289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61843321.

It is not a weakly prime, because it can be changed into another prime (61843351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30921660 + 30921661.

It is an arithmetic number, because the mean of its divisors is an integer number (30921661).

Almost surely, 2^61843321 is an apocalyptic number.

It is an amenable number.

61843321 is a deficient number, since it is larger than the sum of its proper divisors (1).

61843321 is an equidigital number, since it uses as much as digits as its factorization.

61843321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 61843321 is about 7864.0524540468. The cubic root of 61843321 is about 395.4554826899.

The spelling of 61843321 in words is "sixty-one million, eight hundred forty-three thousand, three hundred twenty-one".