61939970 has 32 divisors (see below), whose sum is σ = 114091200. Its totient is φ = 24204096.

The previous prime is 61939931. The next prime is 61939973. The reversal of 61939970 is 7993916.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61939973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163241 + ... + 163619.

It is an arithmetic number, because the mean of its divisors is an integer number (3565350).

Almost surely, 2^61939970 is an apocalyptic number.

61939970 is a deficient number, since it is larger than the sum of its proper divisors (52151230).

61939970 is a wasteful number, since it uses less digits than its factorization.

61939970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 61939970 is about 7870.1950420558. The cubic root of 61939970 is about 395.6613819597.

The spelling of 61939970 in words is "sixty-one million, nine hundred thirty-nine thousand, nine hundred seventy".