61994493 has 12 divisors (see below), whose sum is σ = 97688448. Its totient is φ = 37572360.

The previous prime is 61994477. The next prime is 61994503. The reversal of 61994493 is 39449916.

It is not a de Polignac number, because 61994493 - 2⁴ = 61994477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61994423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313005 + ... + 313202.

It is an arithmetic number, because the mean of its divisors is an integer number (8140704).

Almost surely, 2^61994493 is an apocalyptic number.

It is an amenable number.

61994493 is a deficient number, since it is larger than the sum of its proper divisors (35693955).

61994493 is a wasteful number, since it uses less digits than its factorization.

61994493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626224 (or 626221 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 61994493 is about 7873.6581713966. The cubic root of 61994493 is about 395.7774422828. Note that the first 3 decimals are identical.

The spelling of 61994493 in words is "sixty-one million, nine hundred ninety-four thousand, four hundred ninety-three".