61173890 has 8 divisors (see below), whose sum is σ = 110113020. Its totient is φ = 24469552.

The previous prime is 61173869. The next prime is 61173929. The reversal of 61173890 is 9837116.

It can be written as a sum of positive squares in 2 ways, for example, as 58507201 + 2666689 = 7649^2 + 1633^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 61173890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3058685 + ... + 3058704.

Almost surely, 2^61173890 is an apocalyptic number.

61173890 is a deficient number, since it is larger than the sum of its proper divisors (48939130).

61173890 is a wasteful number, since it uses less digits than its factorization.

61173890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117396.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 61173890 is about 7821.3739202265. The cubic root of 61173890 is about 394.0234167157.

The spelling of 61173890 in words is "sixty-one million, one hundred seventy-three thousand, eight hundred ninety".