61217793 has 24 divisors (see below), whose sum is σ = 108833088. Its totient is φ = 32290272.

The previous prime is 61217759. The next prime is 61217813. The reversal of 61217793 is 39771216.

It is a happy number.

It is not a de Polignac number, because 61217793 - 2⁸ = 61217537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61217713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36555 + ... + 38192.

It is an arithmetic number, because the mean of its divisors is an integer number (4534712).

Almost surely, 2^61217793 is an apocalyptic number.

61217793 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

61217793 is a deficient number, since it is larger than the sum of its proper divisors (47615295).

61217793 is a wasteful number, since it uses less digits than its factorization.

61217793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74773 (or 74770 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 61217793 is about 7824.1800209351. The cubic root of 61217793 is about 394.1176544883.

The spelling of 61217793 in words is "sixty-one million, two hundred seventeen thousand, seven hundred ninety-three".