61868377 has 2 divisors, whose sum is σ = 61868378. Its totient is φ = 61868376.

The previous prime is 61868371. The next prime is 61868393. The reversal of 61868377 is 77386816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31629376 + 30239001 = 5624^2 + 5499^2 .

It is a cyclic number.

It is not a de Polignac number, because 61868377 - 2¹⁹ = 61344089 is a prime.

It is a super-2 number, since 2×61868377² = 7655392145228258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61868371) 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, 30934188 + 30934189.

It is an arithmetic number, because the mean of its divisors is an integer number (30934189).

Almost surely, 2^61868377 is an apocalyptic number.

It is an amenable number.

61868377 is a deficient number, since it is larger than the sum of its proper divisors (1).

61868377 is an equidigital number, since it uses as much as digits as its factorization.

61868377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 61868377 is about 7865.6453644949. The cubic root of 61868377 is about 395.5088821223.

The spelling of 61868377 in words is "sixty-one million, eight hundred sixty-eight thousand, three hundred seventy-seven".