131000011973 has 2 divisors, whose sum is σ = 131000011974. Its totient is φ = 131000011972.

The previous prime is 131000011957. The next prime is 131000012023. The reversal of 131000011973 is 379110000131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130753113604 + 246898369 = 361598^2 + 15713^2 .

It is a cyclic number.

It is not a de Polignac number, because 131000011973 - 2⁴ = 131000011957 is a prime.

It is a super-2 number, since 2×131000011973² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131000011913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65500005986 + 65500005987.

It is an arithmetic number, because the mean of its divisors is an integer number (65500005987).

Almost surely, 2^131000011973 is an apocalyptic number.

It is an amenable number.

131000011973 is a deficient number, since it is larger than the sum of its proper divisors (1).

131000011973 is an equidigital number, since it uses as much as digits as its factorization.

131000011973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 26.

The spelling of 131000011973 in words is "one hundred thirty-one billion, eleven thousand, nine hundred seventy-three".