61973945 has 16 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 44985600.

The previous prime is 61973897. The next prime is 61973969. The reversal of 61973945 is 54937916.

It is not a de Polignac number, because 61973945 - 2⁸ = 61973689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61973896 and 61973905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47816 + ... + 49094.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^61973945 is an apocalyptic number.

It is an amenable number.

61973945 is a deficient number, since it is larger than the sum of its proper divisors (19311175).

61973945 is a wasteful number, since it uses less digits than its factorization.

61973945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176.

The product of its digits is 204120, while the sum is 44.

The square root of 61973945 is about 7872.3532059988. The cubic root of 61973945 is about 395.7337107988.

The spelling of 61973945 in words is "sixty-one million, nine hundred seventy-three thousand, nine hundred forty-five".