342173781 has 32 divisors (see below), whose sum is σ = 514800000. Its totient is φ = 224601984.

The previous prime is 342173749. The next prime is 342173801. The reversal of 342173781 is 187371243.

It is not a de Polignac number, because 342173781 - 2⁵ = 342173749 is a prime.

It is a super-2 number, since 2×342173781² = 234165792807671922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342173681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 685470 + ... + 685968.

It is an arithmetic number, because the mean of its divisors is an integer number (16087500).

Almost surely, 2^342173781 is an apocalyptic number.

It is an amenable number.

342173781 is a deficient number, since it is larger than the sum of its proper divisors (172626219).

342173781 is a wasteful number, since it uses less digits than its factorization.

342173781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850 (or 844 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 342173781 is about 18497.9399123254. The cubic root of 342173781 is about 699.4374943616.

The spelling of 342173781 in words is "three hundred forty-two million, one hundred seventy-three thousand, seven hundred eighty-one".