345641861 has 4 divisors (see below), whose sum is σ = 360669792. Its totient is φ = 330613932.

The previous prime is 345641839. The next prime is 345641867. The reversal of 345641861 is 168146543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168146543 = 89 ⋅1889287.

It is a cyclic number.

It is not a de Polignac number, because 345641861 - 2²⁶ = 278532997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345641867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7513931 + ... + 7513976.

It is an arithmetic number, because the mean of its divisors is an integer number (90167448).

Almost surely, 2^345641861 is an apocalyptic number.

It is an amenable number.

345641861 is a deficient number, since it is larger than the sum of its proper divisors (15027931).

345641861 is a wasteful number, since it uses less digits than its factorization.

345641861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15027930.

The product of its digits is 69120, while the sum is 38.

The square root of 345641861 is about 18591.4459093423. The cubic root of 345641861 is about 701.7925898944.

The spelling of 345641861 in words is "three hundred forty-five million, six hundred forty-one thousand, eight hundred sixty-one".