345283921 has 4 divisors (see below), whose sum is σ = 356422144. Its totient is φ = 334145700.

The previous prime is 345283909. The next prime is 345283931. The reversal of 345283921 is 129382543.

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 cyclic number.

It is not a de Polignac number, because 345283921 - 2¹⁹ = 344759633 is a prime.

It is a super-2 number, since 2×345283921² = 238441972202268482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345283931) 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, 5569065 + ... + 5569126.

It is an arithmetic number, because the mean of its divisors is an integer number (89105536).

Almost surely, 2^345283921 is an apocalyptic number.

345283921 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

345283921 is a deficient number, since it is larger than the sum of its proper divisors (11138223).

345283921 is a wasteful number, since it uses less digits than its factorization.

345283921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11138222.

The product of its digits is 51840, while the sum is 37.

The square root of 345283921 is about 18581.8169456057. The cubic root of 345283921 is about 701.5502519618.

The spelling of 345283921 in words is "three hundred forty-five million, two hundred eighty-three thousand, nine hundred twenty-one".