1973582397 has 6 divisors (see below), whose sum is σ = 2850730142. Its totient is φ = 1315721592.

The previous prime is 1973582393. The next prime is 1973582399. The reversal of 1973582397 is 7932853791.

It can be written as a sum of positive squares in only one way, i.e., 1851236676 + 122345721 = 43026^2 + 11061^2 .

It is not a de Polignac number, because 1973582397 - 2² = 1973582393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973582393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109643458 + ... + 109643475.

Almost surely, 2^1973582397 is an apocalyptic number.

It is an amenable number.

1973582397 is a deficient number, since it is larger than the sum of its proper divisors (877147745).

1973582397 is a wasteful number, since it uses less digits than its factorization.

1973582397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219286939 (or 219286936 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 1973582397 is about 44425.0199437209. The cubic root of 1973582397 is about 1254.3490954393.

The spelling of 1973582397 in words is "one billion, nine hundred seventy-three million, five hundred eighty-two thousand, three hundred ninety-seven".