340401253 has 2 divisors, whose sum is σ = 340401254. Its totient is φ = 340401252.

The previous prime is 340401233. The next prime is 340401323. The reversal of 340401253 is 352104043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329858244 + 10543009 = 18162^2 + 3247^2 .

It is an emirp because it is prime and its reverse (352104043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340401253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340401233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170200626 + 170200627.

It is an arithmetic number, because the mean of its divisors is an integer number (170200627).

Almost surely, 2^340401253 is an apocalyptic number.

It is an amenable number.

340401253 is a deficient number, since it is larger than the sum of its proper divisors (1).

340401253 is an equidigital number, since it uses as much as digits as its factorization.

340401253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 340401253 is about 18449.9662059311. The cubic root of 340401253 is about 698.2276612787.

Adding to 340401253 its reverse (352104043), we get a palindrome (692505296).

The spelling of 340401253 in words is "three hundred forty million, four hundred one thousand, two hundred fifty-three".