61360891 has 2 divisors, whose sum is σ = 61360892. Its totient is φ = 61360890.

The previous prime is 61360879. The next prime is 61360907. The reversal of 61360891 is 19806316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61360891 - 2²¹ = 59263739 is a prime.

It is not a weakly prime, because it can be changed into another prime (61363891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30680445 + 30680446.

It is an arithmetic number, because the mean of its divisors is an integer number (30680446).

Almost surely, 2^61360891 is an apocalyptic number.

61360891 is a deficient number, since it is larger than the sum of its proper divisors (1).

61360891 is an equidigital number, since it uses as much as digits as its factorization.

61360891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 61360891 is about 7833.3192836753. The cubic root of 61360891 is about 394.4245018873.

It can be divided in two parts, 613 and 60891, that added together give a square (61504 = 248²).

The spelling of 61360891 in words is "sixty-one million, three hundred sixty thousand, eight hundred ninety-one".