1343581761 has 4 divisors (see below), whose sum is σ = 1791442352. Its totient is φ = 895721172.

The previous prime is 1343581693. The next prime is 1343581781. The reversal of 1343581761 is 1671853431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1343581761 is a prime.

It is a super-2 number, since 2×1343581761² = 3610423896983722242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1343581781) 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, 223930291 + ... + 223930296.

It is an arithmetic number, because the mean of its divisors is an integer number (447860588).

Almost surely, 2^1343581761 is an apocalyptic number.

It is an amenable number.

1343581761 is a deficient number, since it is larger than the sum of its proper divisors (447860591).

1343581761 is an equidigital number, since it uses as much as digits as its factorization.

1343581761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447860590.

The product of its digits is 60480, while the sum is 39.

The square root of 1343581761 is about 36654.9009137932. The cubic root of 1343581761 is about 1103.4551854927.

The spelling of 1343581761 in words is "one billion, three hundred forty-three million, five hundred eighty-one thousand, seven hundred sixty-one".