61193391 has 16 divisors (see below), whose sum is σ = 93374208. Its totient is φ = 34920000.

The previous prime is 61193383. The next prime is 61193401. The reversal of 61193391 is 19339116.

It is a happy number.

It is not a de Polignac number, because 61193391 - 2³ = 61193383 is a prime.

It is a super-2 number, since 2×61193391² = 7489262204157762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61193351) 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 in 15 ways as a sum of consecutive naturals, for example, 18891 + ... + 21891.

It is an arithmetic number, because the mean of its divisors is an integer number (5835888).

Almost surely, 2^61193391 is an apocalyptic number.

61193391 is a deficient number, since it is larger than the sum of its proper divisors (32180817).

61193391 is a wasteful number, since it uses less digits than its factorization.

61193391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3982.

The product of its digits is 4374, while the sum is 33.

The square root of 61193391 is about 7822.6204688710. The cubic root of 61193391 is about 394.0652811686.

The spelling of 61193391 in words is "sixty-one million, one hundred ninety-three thousand, three hundred ninety-one".