61493111 has 2 divisors, whose sum is σ = 61493112. Its totient is φ = 61493110.

The previous prime is 61493093. The next prime is 61493227. The reversal of 61493111 is 11139416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61493111 - 2²² = 57298807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61493011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30746555 + 30746556.

It is an arithmetic number, because the mean of its divisors is an integer number (30746556).

Almost surely, 2^61493111 is an apocalyptic number.

61493111 is a deficient number, since it is larger than the sum of its proper divisors (1).

61493111 is an equidigital number, since it uses as much as digits as its factorization.

61493111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 26.

The square root of 61493111 is about 7841.7543317806. The cubic root of 61493111 is about 394.7075996580.

The spelling of 61493111 in words is "sixty-one million, four hundred ninety-three thousand, one hundred eleven".