354640369 has 2 divisors, whose sum is σ = 354640370. Its totient is φ = 354640368.

The previous prime is 354640367. The next prime is 354640379. The reversal of 354640369 is 963046453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295427344 + 59213025 = 17188^2 + 7695^2 .

It is a cyclic number.

It is not a de Polignac number, because 354640369 - 2¹ = 354640367 is a prime.

It is a super-2 number, since 2×354640369² = 251539582648912322, which contains 22 as substring.

Together with 354640367, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (354640367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177320184 + 177320185.

It is an arithmetic number, because the mean of its divisors is an integer number (177320185).

Almost surely, 2^354640369 is an apocalyptic number.

It is an amenable number.

354640369 is a deficient number, since it is larger than the sum of its proper divisors (1).

354640369 is an equidigital number, since it uses as much as digits as its factorization.

354640369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 40.

The square root of 354640369 is about 18831.8976473429. The cubic root of 354640369 is about 707.8306920904.

The spelling of 354640369 in words is "three hundred fifty-four million, six hundred forty thousand, three hundred sixty-nine".