345420787 has 4 divisors (see below), whose sum is σ = 345746800. Its totient is φ = 345094776.

The previous prime is 345420749. The next prime is 345420793. The reversal of 345420787 is 787024543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 345420787 - 2²⁷ = 211203059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345420727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161412 + ... + 163537.

It is an arithmetic number, because the mean of its divisors is an integer number (86436700).

Almost surely, 2^345420787 is an apocalyptic number.

345420787 is a deficient number, since it is larger than the sum of its proper divisors (326013).

345420787 is a wasteful number, since it uses less digits than its factorization.

345420787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326012.

The product of its (nonzero) digits is 188160, while the sum is 40.

The square root of 345420787 is about 18585.4993745124. The cubic root of 345420787 is about 701.6429348111.

The spelling of 345420787 in words is "three hundred forty-five million, four hundred twenty thousand, seven hundred eighty-seven".