61878371 has 2 divisors, whose sum is σ = 61878372. Its totient is φ = 61878370.

The previous prime is 61878361. The next prime is 61878403. The reversal of 61878371 is 17387816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61878371 - 2¹⁸ = 61616227 is a prime.

It is a super-2 number, since 2×61878371² = 7657865595227282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61878361) 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, 30939185 + 30939186.

It is an arithmetic number, because the mean of its divisors is an integer number (30939186).

Almost surely, 2^61878371 is an apocalyptic number.

61878371 is a deficient number, since it is larger than the sum of its proper divisors (1).

61878371 is an equidigital number, since it uses as much as digits as its factorization.

61878371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 41.

The square root of 61878371 is about 7866.2806331836. The cubic root of 61878371 is about 395.5301773469.

The spelling of 61878371 in words is "sixty-one million, eight hundred seventy-eight thousand, three hundred seventy-one".