1973613973 has 2 divisors, whose sum is σ = 1973613974. Its totient is φ = 1973613972.

The previous prime is 1973613913. The next prime is 1973614021. The reversal of 1973613973 is 3793163791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1904275044 + 69338929 = 43638^2 + 8327^2 .

It is a cyclic number.

It is not a de Polignac number, because 1973613973 - 2⁹ = 1973613461 is a prime.

It is a super-2 number, since 2×1973613973² = 7790304228841689458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973613913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986806986 + 986806987.

It is an arithmetic number, because the mean of its divisors is an integer number (986806987).

Almost surely, 2^1973613973 is an apocalyptic number.

It is an amenable number.

1973613973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973613973 is an equidigital number, since it uses as much as digits as its factorization.

1973613973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 49.

The square root of 1973613973 is about 44425.3753276210. The cubic root of 1973613973 is about 1254.3557849862.

The spelling of 1973613973 in words is "one billion, nine hundred seventy-three million, six hundred thirteen thousand, nine hundred seventy-three".