1351838819 has 4 divisors (see below), whose sum is σ = 1364241120. Its totient is φ = 1339436520.

The previous prime is 1351838797. The next prime is 1351838837. The reversal of 1351838819 is 9188381531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9188381531 = 7 ⋅1312625933.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1351838819 is a prime.

It is a super-2 number, since 2×1351838819² = 3654936385110629522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1351838849) 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, 6200987 + ... + 6201204.

It is an arithmetic number, because the mean of its divisors is an integer number (341060280).

Almost surely, 2^1351838819 is an apocalyptic number.

1351838819 is a deficient number, since it is larger than the sum of its proper divisors (12402301).

1351838819 is a wasteful number, since it uses less digits than its factorization.

1351838819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12402300.

The product of its digits is 207360, while the sum is 47.

The square root of 1351838819 is about 36767.3607837169. The cubic root of 1351838819 is about 1105.7110194977.

The spelling of 1351838819 in words is "one billion, three hundred fifty-one million, eight hundred thirty-eight thousand, eight hundred nineteen".