340623931 has 4 divisors (see below), whose sum is σ = 340686864. Its totient is φ = 340561000.

The previous prime is 340623929. The next prime is 340623953. The reversal of 340623931 is 139326043.

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 340623931 - 2¹ = 340623929 is a prime.

It is a super-2 number, since 2×340623931² = 232049324739785522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340623893 and 340623902.

It is not an unprimeable number, because it can be changed into a prime (340623331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22495 + ... + 34456.

It is an arithmetic number, because the mean of its divisors is an integer number (85171716).

Almost surely, 2^340623931 is an apocalyptic number.

340623931 is a deficient number, since it is larger than the sum of its proper divisors (62933).

340623931 is an equidigital number, since it uses as much as digits as its factorization.

340623931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62932.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 340623931 is about 18455.9998645427. Note that the first 3 decimals coincide. The cubic root of 340623931 is about 698.3798797239.

Adding to 340623931 its reverse (139326043), we get a palindrome (479949974).

The spelling of 340623931 in words is "three hundred forty million, six hundred twenty-three thousand, nine hundred thirty-one".