61491193 has 8 divisors (see below), whose sum is σ = 66081312. Its totient is φ = 57009216.

The previous prime is 61491119. The next prime is 61491203. The reversal of 61491193 is 39119416.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61491193 - 2¹³ = 61483001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61291193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25855 + ... + 28132.

It is an arithmetic number, because the mean of its divisors is an integer number (8260164).

Almost surely, 2^61491193 is an apocalyptic number.

It is an amenable number.

61491193 is a deficient number, since it is larger than the sum of its proper divisors (4590119).

61491193 is a wasteful number, since it uses less digits than its factorization.

61491193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54071.

The product of its digits is 5832, while the sum is 34.

The square root of 61491193 is about 7841.6320367638. The cubic root of 61491193 is about 394.7034959081.

The spelling of 61491193 in words is "sixty-one million, four hundred ninety-one thousand, one hundred ninety-three".