61972985 has 8 divisors (see below), whose sum is σ = 75386760. Its totient is φ = 48898944.

The previous prime is 61972961. The next prime is 61972991. The reversal of 61972985 is 58927916.

It can be written as a sum of positive squares in 4 ways, for example, as 10291264 + 51681721 = 3208^2 + 7189^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 61972985 - 2¹⁰ = 61971961 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84530 + ... + 85259.

It is an arithmetic number, because the mean of its divisors is an integer number (9423345).

Almost surely, 2^61972985 is an apocalyptic number.

It is an amenable number.

61972985 is a deficient number, since it is larger than the sum of its proper divisors (13413775).

61972985 is a wasteful number, since it uses less digits than its factorization.

61972985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169867.

The product of its digits is 272160, while the sum is 47.

The square root of 61972985 is about 7872.2922328887. The cubic root of 61972985 is about 395.7316674330.

The spelling of 61972985 in words is "sixty-one million, nine hundred seventy-two thousand, nine hundred eighty-five".