61684349 has 2 divisors, whose sum is σ = 61684350. Its totient is φ = 61684348.

The previous prime is 61684309. The next prime is 61684417. The reversal of 61684349 is 94348616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31158724 + 30525625 = 5582^2 + 5525^2 .

It is a cyclic number.

It is not a de Polignac number, because 61684349 - 2⁸ = 61684093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61684309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30842174 + 30842175.

It is an arithmetic number, because the mean of its divisors is an integer number (30842175).

Almost surely, 2^61684349 is an apocalyptic number.

It is an amenable number.

61684349 is a deficient number, since it is larger than the sum of its proper divisors (1).

61684349 is an equidigital number, since it uses as much as digits as its factorization.

61684349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 61684349 is about 7853.9384387707. The cubic root of 61684349 is about 395.1163445136.

The spelling of 61684349 in words is "sixty-one million, six hundred eighty-four thousand, three hundred forty-nine".