345331987 has 16 divisors (see below), whose sum is σ = 463663872. Its totient is φ = 248389920.

The previous prime is 345331981. The next prime is 345331997. The reversal of 345331987 is 789133543.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 345331987 - 2¹⁵ = 345299219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345331981) 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 15 ways as a sum of consecutive naturals, for example, 171493 + ... + 173494.

It is an arithmetic number, because the mean of its divisors is an integer number (28978992).

Almost surely, 2^345331987 is an apocalyptic number.

345331987 is a deficient number, since it is larger than the sum of its proper divisors (118331885).

345331987 is a wasteful number, since it uses less digits than its factorization.

345331987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345018.

The product of its digits is 272160, while the sum is 43.

The square root of 345331987 is about 18583.1102617404. The cubic root of 345331987 is about 701.5828040615.

The spelling of 345331987 in words is "three hundred forty-five million, three hundred thirty-one thousand, nine hundred eighty-seven".