345172147 has 4 divisors (see below), whose sum is σ = 345487896. Its totient is φ = 344856400.

The previous prime is 345172129. The next prime is 345172187. The reversal of 345172147 is 741271543.

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 345172147 - 2¹¹ = 345170099 is a prime.

It is a super-2 number, since 2×345172147² = 238287622129179218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345172117) 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, 156229 + ... + 158422.

It is an arithmetic number, because the mean of its divisors is an integer number (86371974).

Almost surely, 2^345172147 is an apocalyptic number.

345172147 is a deficient number, since it is larger than the sum of its proper divisors (315749).

345172147 is a wasteful number, since it uses less digits than its factorization.

345172147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315748.

The product of its digits is 23520, while the sum is 34.

The square root of 345172147 is about 18578.8090845458. The cubic root of 345172147 is about 701.4745427305.

The spelling of 345172147 in words is "three hundred forty-five million, one hundred seventy-two thousand, one hundred forty-seven".