61447219 has 2 divisors, whose sum is σ = 61447220. Its totient is φ = 61447218.

The previous prime is 61447213. The next prime is 61447223. The reversal of 61447219 is 91274416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61447219 - 2²³ = 53058611 is a prime.

It is a super-2 number, since 2×61447219² = 7551521445667922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61447213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30723609 + 30723610.

It is an arithmetic number, because the mean of its divisors is an integer number (30723610).

Almost surely, 2^61447219 is an apocalyptic number.

61447219 is a deficient number, since it is larger than the sum of its proper divisors (1).

61447219 is an equidigital number, since it uses as much as digits as its factorization.

61447219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 61447219 is about 7838.8276546943. The cubic root of 61447219 is about 394.6093857885.

The spelling of 61447219 in words is "sixty-one million, four hundred forty-seven thousand, two hundred nineteen".