156389229397 has 2 divisors, whose sum is σ = 156389229398. Its totient is φ = 156389229396.

The previous prime is 156389229377. The next prime is 156389229427. The reversal of 156389229397 is 793922983651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97249798801 + 59139430596 = 311849^2 + 243186^2 .

It is a cyclic number.

It is not a de Polignac number, because 156389229397 - 2¹⁵ = 156389196629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156389229377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78194614698 + 78194614699.

It is an arithmetic number, because the mean of its divisors is an integer number (78194614699).

Almost surely, 2^156389229397 is an apocalyptic number.

It is an amenable number.

156389229397 is a deficient number, since it is larger than the sum of its proper divisors (1).

156389229397 is an equidigital number, since it uses as much as digits as its factorization.

156389229397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44089920, while the sum is 64.

The spelling of 156389229397 in words is "one hundred fifty-six billion, three hundred eighty-nine million, two hundred twenty-nine thousand, three hundred ninety-seven".