1351487189 has 4 divisors (see below), whose sum is σ = 1455447756. Its totient is φ = 1247526624.

The previous prime is 1351487183. The next prime is 1351487219. The reversal of 1351487189 is 9817841531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9817841531 = 7823 ⋅1254997.

It can be written as a sum of positive squares in 2 ways, for example, as 65691025 + 1285796164 = 8105^2 + 35858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1351487189 - 2⁴ = 1351487173 is a prime.

It is a super-2 number, since 2×1351487189² = 3653035244062243442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351487183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51980264 + ... + 51980289.

It is an arithmetic number, because the mean of its divisors is an integer number (363861939).

Almost surely, 2^1351487189 is an apocalyptic number.

It is an amenable number.

1351487189 is a deficient number, since it is larger than the sum of its proper divisors (103960567).

1351487189 is a wasteful number, since it uses less digits than its factorization.

1351487189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103960566.

The product of its digits is 241920, while the sum is 47.

The square root of 1351487189 is about 36762.5786500349. The cubic root of 1351487189 is about 1105.6151414793.

The spelling of 1351487189 in words is "one billion, three hundred fifty-one million, four hundred eighty-seven thousand, one hundred eighty-nine".