61812319 has 2 divisors, whose sum is σ = 61812320. Its totient is φ = 61812318.

The previous prime is 61812307. The next prime is 61812329. The reversal of 61812319 is 91321816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61812319 - 2¹¹ = 61810271 is a prime.

It is a super-2 number, since 2×61812319² = 7641525560315522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61812329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30906159 + 30906160.

It is an arithmetic number, because the mean of its divisors is an integer number (30906160).

Almost surely, 2^61812319 is an apocalyptic number.

61812319 is a deficient number, since it is larger than the sum of its proper divisors (1).

61812319 is an equidigital number, since it uses as much as digits as its factorization.

61812319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

The square root of 61812319 is about 7862.0810858195. The cubic root of 61812319 is about 395.3893911548.

The spelling of 61812319 in words is "sixty-one million, eight hundred twelve thousand, three hundred nineteen".