61216349 has 2 divisors, whose sum is σ = 61216350. Its totient is φ = 61216348.

The previous prime is 61216333. The next prime is 61216369. The reversal of 61216349 is 94361216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41190724 + 20025625 = 6418^2 + 4475^2 .

It is a cyclic number.

It is not a de Polignac number, because 61216349 - 2⁴ = 61216333 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61216369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30608174 + 30608175.

It is an arithmetic number, because the mean of its divisors is an integer number (30608175).

Almost surely, 2^61216349 is an apocalyptic number.

It is an amenable number.

61216349 is a deficient number, since it is larger than the sum of its proper divisors (1).

61216349 is an equidigital number, since it uses as much as digits as its factorization.

61216349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 61216349 is about 7824.0877423505. The cubic root of 61216349 is about 394.1145556596.

It can be divided in two parts, 612 and 16349, that added together give a palindrome (16961).

The spelling of 61216349 in words is "sixty-one million, two hundred sixteen thousand, three hundred forty-nine".