340645931 has 2 divisors, whose sum is σ = 340645932. Its totient is φ = 340645930.

The previous prime is 340645901. The next prime is 340645937. The reversal of 340645931 is 139546043.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340645931 - 2¹⁸ = 340383787 is a prime.

It is a super-2 number, since 2×340645931² = 232079300613713522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 340645891 and 340645900.

It is not a weakly prime, because it can be changed into another prime (340645937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170322965 + 170322966.

It is an arithmetic number, because the mean of its divisors is an integer number (170322966).

Almost surely, 2^340645931 is an apocalyptic number.

340645931 is a deficient number, since it is larger than the sum of its proper divisors (1).

340645931 is an equidigital number, since it uses as much as digits as its factorization.

340645931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 340645931 is about 18456.5958670606. The cubic root of 340645931 is about 698.3949149041.

The spelling of 340645931 in words is "three hundred forty million, six hundred forty-five thousand, nine hundred thirty-one".