389671081531 has 2 divisors, whose sum is σ = 389671081532. Its totient is φ = 389671081530.

The previous prime is 389671081507. The next prime is 389671081543. The reversal of 389671081531 is 135180176983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 389671081531 - 2¹⁵ = 389671048763 is a prime.

It is a super-2 number, since 2×389671081531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (389671091531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194835540765 + 194835540766.

It is an arithmetic number, because the mean of its divisors is an integer number (194835540766).

Almost surely, 2^389671081531 is an apocalyptic number.

389671081531 is a deficient number, since it is larger than the sum of its proper divisors (1).

389671081531 is an equidigital number, since it uses as much as digits as its factorization.

389671081531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 389671081531 in words is "three hundred eighty-nine billion, six hundred seventy-one million, eighty-one thousand, five hundred thirty-one".