61963439 has 2 divisors, whose sum is σ = 61963440. Its totient is φ = 61963438.

The previous prime is 61963417. The next prime is 61963441. The reversal of 61963439 is 93436916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61963439 - 2¹² = 61959343 is a prime.

Together with 61963441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61963396 and 61963405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61963939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30981719 + 30981720.

It is an arithmetic number, because the mean of its divisors is an integer number (30981720).

Almost surely, 2^61963439 is an apocalyptic number.

61963439 is a deficient number, since it is larger than the sum of its proper divisors (1).

61963439 is an equidigital number, since it uses as much as digits as its factorization.

61963439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The square root of 61963439 is about 7871.6859058273. The cubic root of 61963439 is about 395.7113475658.

The spelling of 61963439 in words is "sixty-one million, nine hundred sixty-three thousand, four hundred thirty-nine".