87572129399 has 2 divisors, whose sum is σ = 87572129400. Its totient is φ = 87572129398.

The previous prime is 87572129387. The next prime is 87572129467. The reversal of 87572129399 is 99392127578.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87572129399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87572120399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43786064699 + 43786064700.

It is an arithmetic number, because the mean of its divisors is an integer number (43786064700).

Almost surely, 2^87572129399 is an apocalyptic number.

87572129399 is a deficient number, since it is larger than the sum of its proper divisors (1).

87572129399 is an equidigital number, since it uses as much as digits as its factorization.

87572129399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17146080, while the sum is 62.

The spelling of 87572129399 in words is "eighty-seven billion, five hundred seventy-two million, one hundred twenty-nine thousand, three hundred ninety-nine".