340620503 has 4 divisors (see below), whose sum is σ = 340686528. Its totient is φ = 340554480.

The previous prime is 340620481. The next prime is 340620509. The reversal of 340620503 is 305026043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305026043 = 7 ⋅43575149.

It is a cyclic number.

It is not a de Polignac number, because 340620503 - 2⁶ = 340620439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340620509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24551 + ... + 35832.

It is an arithmetic number, because the mean of its divisors is an integer number (85171632).

Almost surely, 2^340620503 is an apocalyptic number.

340620503 is a deficient number, since it is larger than the sum of its proper divisors (66025).

340620503 is an equidigital number, since it uses as much as digits as its factorization.

340620503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66024.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 340620503 is about 18455.9069947808. The cubic root of 340620503 is about 698.3775369111.

Adding to 340620503 its reverse (305026043), we get a palindrome (645646546).

The spelling of 340620503 in words is "three hundred forty million, six hundred twenty thousand, five hundred three".