61958279 has 2 divisors, whose sum is σ = 61958280. Its totient is φ = 61958278.

The previous prime is 61958261. The next prime is 61958321. The reversal of 61958279 is 97285916.

61958279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61958279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61958209) 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, 30979139 + 30979140.

It is an arithmetic number, because the mean of its divisors is an integer number (30979140).

Almost surely, 2^61958279 is an apocalyptic number.

61958279 is a deficient number, since it is larger than the sum of its proper divisors (1).

61958279 is an equidigital number, since it uses as much as digits as its factorization.

61958279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 61958279 is about 7871.3581420235. The cubic root of 61958279 is about 395.7003629848.

The spelling of 61958279 in words is "sixty-one million, nine hundred fifty-eight thousand, two hundred seventy-nine".