345490807 has 2 divisors, whose sum is σ = 345490808. Its totient is φ = 345490806.

The previous prime is 345490781. The next prime is 345490811. The reversal of 345490807 is 708094543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345490807 - 2²⁷ = 211273079 is a prime.

It is a super-2 number, since 2×345490807² = 238727795443022498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 345490807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345490837) 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 as a sum of consecutive naturals, namely, 172745403 + 172745404.

It is an arithmetic number, because the mean of its divisors is an integer number (172745404).

Almost surely, 2^345490807 is an apocalyptic number.

345490807 is a deficient number, since it is larger than the sum of its proper divisors (1).

345490807 is an equidigital number, since it uses as much as digits as its factorization.

345490807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 345490807 is about 18587.3830056843. The cubic root of 345490807 is about 701.6903414533.

The spelling of 345490807 in words is "three hundred forty-five million, four hundred ninety thousand, eight hundred seven".