61939386 has 12 divisors (see below), whose sum is σ = 134202042. Its totient is φ = 20646456.

The previous prime is 61939357. The next prime is 61939403. The reversal of 61939386 is 68393916.

It can be written as a sum of positive squares in only one way, i.e., 61921161 + 18225 = 7869^2 + 135^2 .

It is a super-3 number, since 3×61939386³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1720521 + ... + 1720556.

Almost surely, 2^61939386 is an apocalyptic number.

61939386 is an abundant number, since it is smaller than the sum of its proper divisors (72262656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61939386 is a wasteful number, since it uses less digits than its factorization.

61939386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441085 (or 3441082 counting only the distinct ones).

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

The square root of 61939386 is about 7870.1579399654. The cubic root of 61939386 is about 395.6601384601.

The spelling of 61939386 in words is "sixty-one million, nine hundred thirty-nine thousand, three hundred eighty-six".