61880381 has 2 divisors, whose sum is σ = 61880382. Its totient is φ = 61880380.

The previous prime is 61880353. The next prime is 61880383. The reversal of 61880381 is 18308816.

It is a happy number.

61880381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56400100 + 5480281 = 7510^2 + 2341^2 .

It is a cyclic number.

It is not a de Polignac number, because 61880381 - 2¹⁸ = 61618237 is a prime.

It is a super-2 number, since 2×61880381² = 7658363105410322, which contains 22 as substring.

Together with 61880383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61880383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30940190 + 30940191.

It is an arithmetic number, because the mean of its divisors is an integer number (30940191).

Almost surely, 2^61880381 is an apocalyptic number.

It is an amenable number.

61880381 is a deficient number, since it is larger than the sum of its proper divisors (1).

61880381 is an equidigital number, since it uses as much as digits as its factorization.

61880381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 61880381 is about 7866.4083926529. The cubic root of 61880381 is about 395.5344599799.

The spelling of 61880381 in words is "sixty-one million, eight hundred eighty thousand, three hundred eighty-one".