1973646401 has 8 divisors (see below), whose sum is σ = 1991385000. Its totient is φ = 1955968000.

The previous prime is 1973646391. The next prime is 1973646407. The reversal of 1973646401 is 1046463791.

It can be written as a sum of positive squares in 4 ways, for example, as 61858225 + 1911788176 = 7865^2 + 43724^2 .

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 1973646401 - 2¹⁴ = 1973630017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1973646407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52151 + ... + 81651.

It is an arithmetic number, because the mean of its divisors is an integer number (248923125).

Almost surely, 2^1973646401 is an apocalyptic number.

It is an amenable number.

1973646401 is a deficient number, since it is larger than the sum of its proper divisors (17738599).

1973646401 is a wasteful number, since it uses less digits than its factorization.

1973646401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30099.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1973646401 is about 44425.7402977148. The cubic root of 1973646401 is about 1254.3626549596.

The spelling of 1973646401 in words is "one billion, nine hundred seventy-three million, six hundred forty-six thousand, four hundred one".