61816319 has 2 divisors, whose sum is σ = 61816320. Its totient is φ = 61816318.

The previous prime is 61816303. The next prime is 61816331. The reversal of 61816319 is 91361816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61816319 - 2⁴ = 61816303 is a prime.

It is a super-2 number, since 2×61816319² = 7642514589419522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61816399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30908159 + 30908160.

It is an arithmetic number, because the mean of its divisors is an integer number (30908160).

Almost surely, 2^61816319 is an apocalyptic number.

61816319 is a deficient number, since it is larger than the sum of its proper divisors (1).

61816319 is an equidigital number, since it uses as much as digits as its factorization.

61816319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 61816319 is about 7862.3354672769. The cubic root of 61816319 is about 395.3979197862.

The spelling of 61816319 in words is "sixty-one million, eight hundred sixteen thousand, three hundred nineteen".