345520687 has 2 divisors, whose sum is σ = 345520688. Its totient is φ = 345520686.

The previous prime is 345520667. The next prime is 345520711. The reversal of 345520687 is 786025543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345520687 - 2¹¹ = 345518639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345520667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172760343 + 172760344.

It is an arithmetic number, because the mean of its divisors is an integer number (172760344).

Almost surely, 2^345520687 is an apocalyptic number.

345520687 is a deficient number, since it is larger than the sum of its proper divisors (1).

345520687 is an equidigital number, since it uses as much as digits as its factorization.

345520687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 345520687 is about 18588.1867593372. The cubic root of 345520687 is about 701.7105695873.

It can be divided in two parts, 3455 and 20687, that added together give a palindrome (24142).

The spelling of 345520687 in words is "three hundred forty-five million, five hundred twenty thousand, six hundred eighty-seven".