345631969 has 8 divisors (see below), whose sum is σ = 347972328. Its totient is φ = 343297920.

The previous prime is 345631963. The next prime is 345631987. The reversal of 345631969 is 969136543.

It can be written as a sum of positive squares in 4 ways, for example, as 32341969 + 313290000 = 5687^2 + 17700^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345631969 - 2³ = 345631961 is a prime.

It is a super-2 number, since 2×345631969² = 238922915989633922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345631961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160669 + ... + 162805.

It is an arithmetic number, because the mean of its divisors is an integer number (43496541).

Almost surely, 2^345631969 is an apocalyptic number.

It is an amenable number.

345631969 is a deficient number, since it is larger than the sum of its proper divisors (2340359).

345631969 is a wasteful number, since it uses less digits than its factorization.

345631969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155.

The product of its digits is 524880, while the sum is 46.

The square root of 345631969 is about 18591.1798711109. The cubic root of 345631969 is about 701.7858949120.

The spelling of 345631969 in words is "three hundred forty-five million, six hundred thirty-one thousand, nine hundred sixty-nine".