1973138597 has 2 divisors, whose sum is σ = 1973138598. Its totient is φ = 1973138596.

The previous prime is 1973138533. The next prime is 1973138603. The reversal of 1973138597 is 7958313791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1705194436 + 267944161 = 41294^2 + 16369^2 .

It is a cyclic number.

It is not a de Polignac number, because 1973138597 - 2⁶ = 1973138533 is a prime.

It is a super-2 number, since 2×1973138597² = 7786551845942256818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973132597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986569298 + 986569299.

It is an arithmetic number, because the mean of its divisors is an integer number (986569299).

Almost surely, 2^1973138597 is an apocalyptic number.

It is an amenable number.

1973138597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973138597 is an equidigital number, since it uses as much as digits as its factorization.

1973138597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 53.

The square root of 1973138597 is about 44420.0247298445. The cubic root of 1973138597 is about 1254.2550664523.

The spelling of 1973138597 in words is "one billion, nine hundred seventy-three million, one hundred thirty-eight thousand, five hundred ninety-seven".