61868371 has 2 divisors, whose sum is σ = 61868372. Its totient is φ = 61868370.

The previous prime is 61868353. The next prime is 61868377. The reversal of 61868371 is 17386816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61868371 - 2⁹ = 61867859 is a prime.

It is not a weakly prime, because it can be changed into another prime (61868377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30934185 + 30934186.

It is an arithmetic number, because the mean of its divisors is an integer number (30934186).

Almost surely, 2^61868371 is an apocalyptic number.

61868371 is a deficient number, since it is larger than the sum of its proper divisors (1).

61868371 is an equidigital number, since it uses as much as digits as its factorization.

61868371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 61868371 is about 7865.6449830894. The cubic root of 61868371 is about 395.5088693369.

The spelling of 61868371 in words is "sixty-one million, eight hundred sixty-eight thousand, three hundred seventy-one".