61973642 has 16 divisors (see below), whose sum is σ = 96023880. Its totient is φ = 29981952.

The previous prime is 61973641. The next prime is 61973647. The reversal of 61973642 is 24637916.

It can be written as a sum of positive squares in 4 ways, for example, as 60202081 + 1771561 = 7759^2 + 1331^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61973596 and 61973605.

It is not an unprimeable number, because it can be changed into a prime (61973641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3734 + ... + 11742.

Almost surely, 2^61973642 is an apocalyptic number.

61973642 is a deficient number, since it is larger than the sum of its proper divisors (34050238).

61973642 is a wasteful number, since it uses less digits than its factorization.

61973642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8137.

The product of its digits is 54432, while the sum is 38.

The square root of 61973642 is about 7872.3339614120. Note that the first 3 decimals coincide. The cubic root of 61973642 is about 395.7330658637.

The spelling of 61973642 in words is "sixty-one million, nine hundred seventy-three thousand, six hundred forty-two".