351340661 has 4 divisors (see below), whose sum is σ = 401532192. Its totient is φ = 301149132.

The previous prime is 351340643. The next prime is 351340667. The reversal of 351340661 is 166043153.

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, and also an emirpimes, since its reverse is a distinct semiprime: 166043153 = 41 ⋅4049833.

It is a cyclic number.

It is not a de Polignac number, because 351340661 - 2²² = 347146357 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 (351340667) 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, 25095755 + ... + 25095768.

It is an arithmetic number, because the mean of its divisors is an integer number (100383048).

Almost surely, 2^351340661 is an apocalyptic number.

It is an amenable number.

351340661 is a deficient number, since it is larger than the sum of its proper divisors (50191531).

351340661 is an equidigital number, since it uses as much as digits as its factorization.

351340661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50191530.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 351340661 is about 18744.0833598232. The cubic root of 351340661 is about 705.6285399424.

The spelling of 351340661 in words is "three hundred fifty-one million, three hundred forty thousand, six hundred sixty-one".