1587168397 has 2 divisors, whose sum is σ = 1587168398. Its totient is φ = 1587168396.

The previous prime is 1587168389. The next prime is 1587168437. The reversal of 1587168397 is 7938617851.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1237702761 + 349465636 = 35181^2 + 18694^2 .

It is a cyclic number.

It is not a de Polignac number, because 1587168397 - 2³ = 1587168389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1587168307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 793584198 + 793584199.

It is an arithmetic number, because the mean of its divisors is an integer number (793584199).

Almost surely, 2^1587168397 is an apocalyptic number.

It is an amenable number.

1587168397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1587168397 is an equidigital number, since it uses as much as digits as its factorization.

1587168397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 55.

The square root of 1587168397 is about 39839.2820843950. The cubic root of 1587168397 is about 1166.4720466197.

The spelling of 1587168397 in words is "one billion, five hundred eighty-seven million, one hundred sixty-eight thousand, three hundred ninety-seven".