345375731 has 2 divisors, whose sum is σ = 345375732. Its totient is φ = 345375730.

The previous prime is 345375713. The next prime is 345375769. The reversal of 345375731 is 137573543.

It is a happy number.

Together with previous prime (345375713) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (345375769) can be obtained adding 345375731 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345375731 is a prime.

It is a super-2 number, since 2×345375731² = 238568791127568722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_18568334 and since 345375731 and 18568334 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (345375031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172687865 + 172687866.

It is an arithmetic number, because the mean of its divisors is an integer number (172687866).

Almost surely, 2^345375731 is an apocalyptic number.

345375731 is a deficient number, since it is larger than the sum of its proper divisors (1).

345375731 is an equidigital number, since it uses as much as digits as its factorization.

345375731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 38.

The square root of 345375731 is about 18584.2872072081. The cubic root of 345375731 is about 701.6124265152.

The spelling of 345375731 in words is "three hundred forty-five million, three hundred seventy-five thousand, seven hundred thirty-one".