61213970 has 8 divisors (see below), whose sum is σ = 110185164. Its totient is φ = 24485584.

The previous prime is 61213963. The next prime is 61213981. The reversal of 61213970 is 7931216.

It can be written as a sum of positive squares in 2 ways, for example, as 61199329 + 14641 = 7823^2 + 121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3060689 + ... + 3060708.

Almost surely, 2^61213970 is an apocalyptic number.

61213970 is a deficient number, since it is larger than the sum of its proper divisors (48971194).

61213970 is a wasteful number, since it uses less digits than its factorization.

61213970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6121404.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 61213970 is about 7823.9357103698. The cubic root of 61213970 is about 394.1094502115.

The spelling of 61213970 in words is "sixty-one million, two hundred thirteen thousand, nine hundred seventy".