345428981 has 4 divisors (see below), whose sum is σ = 345673152. Its totient is φ = 345184812.

The previous prime is 345428969. The next prime is 345428983. The reversal of 345428981 is 189824543.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 345428981 - 2⁶ = 345428917 is a prime.

It is a super-2 number, since 2×345428981² = 238642361829396722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345428983) 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 in 3 ways as a sum of consecutive naturals, for example, 119951 + ... + 122796.

It is an arithmetic number, because the mean of its divisors is an integer number (86418288).

Almost surely, 2^345428981 is an apocalyptic number.

It is an amenable number.

345428981 is a deficient number, since it is larger than the sum of its proper divisors (244171).

345428981 is a wasteful number, since it uses less digits than its factorization.

345428981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244170.

The product of its digits is 276480, while the sum is 44.

The square root of 345428981 is about 18585.7198138786. The cubic root of 345428981 is about 701.6484828431.

The spelling of 345428981 in words is "three hundred forty-five million, four hundred twenty-eight thousand, nine hundred eighty-one".