61986146 has 4 divisors (see below), whose sum is σ = 92979222. Its totient is φ = 30993072.

The previous prime is 61986139. The next prime is 61986149. The reversal of 61986146 is 64168916.

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., 58140625 + 3845521 = 7625^2 + 1961^2 .

It is not an unprimeable number, because it can be changed into a prime (61986149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15496535 + ... + 15496538.

Almost surely, 2^61986146 is an apocalyptic number.

61986146 is a deficient number, since it is larger than the sum of its proper divisors (30993076).

61986146 is a wasteful number, since it uses less digits than its factorization.

61986146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30993075.

The product of its digits is 62208, while the sum is 41.

The square root of 61986146 is about 7873.1280949823. The cubic root of 61986146 is about 395.7596788632.

The spelling of 61986146 in words is "sixty-one million, nine hundred eighty-six thousand, one hundred forty-six".