61938277 has 2 divisors, whose sum is σ = 61938278. Its totient is φ = 61938276.

The previous prime is 61938221. The next prime is 61938311. The reversal of 61938277 is 77283916.

It is a happy number.

61938277 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., 42850116 + 19088161 = 6546^2 + 4369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61938277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61939277) 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, 30969138 + 30969139.

It is an arithmetic number, because the mean of its divisors is an integer number (30969139).

Almost surely, 2^61938277 is an apocalyptic number.

It is an amenable number.

61938277 is a deficient number, since it is larger than the sum of its proper divisors (1).

61938277 is an equidigital number, since it uses as much as digits as its factorization.

61938277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 61938277 is about 7870.0874836307. The cubic root of 61938277 is about 395.6577770670.

The spelling of 61938277 in words is "sixty-one million, nine hundred thirty-eight thousand, two hundred seventy-seven".