61938938 has 4 divisors (see below), whose sum is σ = 92908410. Its totient is φ = 30969468.

The previous prime is 61938937. The next prime is 61938941. The reversal of 61938938 is 83983916.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32638369 + 29300569 = 5713^2 + 5413^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61938892 and 61938901.

It is not an unprimeable number, because it can be changed into a prime (61938937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15484733 + ... + 15484736.

Almost surely, 2^61938938 is an apocalyptic number.

61938938 is a deficient number, since it is larger than the sum of its proper divisors (30969472).

61938938 is a wasteful number, since it uses less digits than its factorization.

61938938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30969471.

The product of its digits is 279936, while the sum is 47.

The square root of 61938938 is about 7870.1294779692. The cubic root of 61938938 is about 395.6591845374.

The spelling of 61938938 in words is "sixty-one million, nine hundred thirty-eight thousand, nine hundred thirty-eight".