61438994 has 8 divisors (see below), whose sum is σ = 95336460. Its totient is φ = 29660176.

The previous prime is 61438963. The next prime is 61438997. The reversal of 61438994 is 49983416.

61438994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 58323769 + 3115225 = 7637^2 + 1765^2 .

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

It is not an unprimeable number, because it can be changed into a prime (61438997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529589 + ... + 529704.

Almost surely, 2^61438994 is an apocalyptic number.

61438994 is a deficient number, since it is larger than the sum of its proper divisors (33897466).

61438994 is a wasteful number, since it uses less digits than its factorization.

61438994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059324.

The product of its digits is 186624, while the sum is 44.

The square root of 61438994 is about 7838.3030051153. The cubic root of 61438994 is about 394.5917782272.

The spelling of 61438994 in words is "sixty-one million, four hundred thirty-eight thousand, nine hundred ninety-four".