1343902661 has 4 divisors (see below), whose sum is σ = 1414634400. Its totient is φ = 1273170924.

The previous prime is 1343902657. The next prime is 1343902691. The reversal of 1343902661 is 1662093431.

It is a happy number.

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 not a de Polignac number, because 1343902661 - 2² = 1343902657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343902621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35365841 + ... + 35365878.

It is an arithmetic number, because the mean of its divisors is an integer number (353658600).

Almost surely, 2^1343902661 is an apocalyptic number.

It is an amenable number.

1343902661 is a deficient number, since it is larger than the sum of its proper divisors (70731739).

1343902661 is an equidigital number, since it uses as much as digits as its factorization.

1343902661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70731738.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 1343902661 is about 36659.2779661575. The cubic root of 1343902661 is about 1103.5430279529.

The spelling of 1343902661 in words is "one billion, three hundred forty-three million, nine hundred two thousand, six hundred sixty-one".