343561649 has 4 divisors (see below), whose sum is σ = 358499136. Its totient is φ = 328624164.

The previous prime is 343561639. The next prime is 343561657. The reversal of 343561649 is 946165343.

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: 946165343 = 9479 ⋅99817.

It is a cyclic number.

It is not a de Polignac number, because 343561649 - 2¹² = 343557553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (343561639) 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, 7468709 + ... + 7468754.

It is an arithmetic number, because the mean of its divisors is an integer number (89624784).

Almost surely, 2^343561649 is an apocalyptic number.

It is an amenable number.

343561649 is a deficient number, since it is larger than the sum of its proper divisors (14937487).

343561649 is a wasteful number, since it uses less digits than its factorization.

343561649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14937486.

The product of its digits is 233280, while the sum is 41.

The square root of 343561649 is about 18535.4160730209. The cubic root of 343561649 is about 700.3818657954.

The spelling of 343561649 in words is "three hundred forty-three million, five hundred sixty-one thousand, six hundred forty-nine".