1343872157 has 2 divisors, whose sum is σ = 1343872158. Its totient is φ = 1343872156.

The previous prime is 1343872141. The next prime is 1343872169. The reversal of 1343872157 is 7512783431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1342929316 + 942841 = 36646^2 + 971^2 .

It is an emirp because it is prime and its reverse (7512783431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1343872157 - 2⁴ = 1343872141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1343872177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671936078 + 671936079.

It is an arithmetic number, because the mean of its divisors is an integer number (671936079).

Almost surely, 2^1343872157 is an apocalyptic number.

It is an amenable number.

1343872157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343872157 is an equidigital number, since it uses as much as digits as its factorization.

1343872157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 41.

The square root of 1343872157 is about 36658.8619163225. The cubic root of 1343872157 is about 1103.5346784565.

The spelling of 1343872157 in words is "one billion, three hundred forty-three million, eight hundred seventy-two thousand, one hundred fifty-seven".