345121473 has 4 divisors (see below), whose sum is σ = 460161968. Its totient is φ = 230080980.

The previous prime is 345121429. The next prime is 345121499. The reversal of 345121473 is 374121543.

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 345121473 - 2¹⁰ = 345120449 is a prime.

It is a super-2 number, since 2×345121473² = 238217662251379458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 345121473.

It is not an unprimeable number, because it can be changed into a prime (345120473) 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, 57520243 + ... + 57520248.

It is an arithmetic number, because the mean of its divisors is an integer number (115040492).

Almost surely, 2^345121473 is an apocalyptic number.

It is an amenable number.

345121473 is a deficient number, since it is larger than the sum of its proper divisors (115040495).

345121473 is a wasteful number, since it uses less digits than its factorization.

345121473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115040494.

The product of its digits is 10080, while the sum is 30.

The square root of 345121473 is about 18577.4452764636. The cubic root of 345121473 is about 701.4402137143.

The spelling of 345121473 in words is "three hundred forty-five million, one hundred twenty-one thousand, four hundred seventy-three".