61880447 has 2 divisors, whose sum is σ = 61880448. Its totient is φ = 61880446.

The previous prime is 61880407. The next prime is 61880449. The reversal of 61880447 is 74408816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61880447 - 2⁶ = 61880383 is a prime.

Together with 61880449, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61880447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61880449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30940223 + 30940224.

It is an arithmetic number, because the mean of its divisors is an integer number (30940224).

Almost surely, 2^61880447 is an apocalyptic number.

61880447 is a deficient number, since it is larger than the sum of its proper divisors (1).

61880447 is an equidigital number, since it uses as much as digits as its factorization.

61880447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 61880447 is about 7866.4125877048. The cubic root of 61880447 is about 395.5346006021.

The spelling of 61880447 in words is "sixty-one million, eight hundred eighty thousand, four hundred forty-seven".