61381867 has 2 divisors, whose sum is σ = 61381868. Its totient is φ = 61381866.

The previous prime is 61381823. The next prime is 61381877. The reversal of 61381867 is 76818316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61381867 - 2¹¹ = 61379819 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61381877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30690933 + 30690934.

It is an arithmetic number, because the mean of its divisors is an integer number (30690934).

Almost surely, 2^61381867 is an apocalyptic number.

61381867 is a deficient number, since it is larger than the sum of its proper divisors (1).

61381867 is an equidigital number, since it uses as much as digits as its factorization.

61381867 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 61381867 is about 7834.6580652891. The cubic root of 61381867 is about 394.4694409662.

The spelling of 61381867 in words is "sixty-one million, three hundred eighty-one thousand, eight hundred sixty-seven".