354640129 has 2 divisors, whose sum is σ = 354640130. Its totient is φ = 354640128.

The previous prime is 354640127. The next prime is 354640133. The reversal of 354640129 is 921046453.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324828529 + 29811600 = 18023^2 + 5460^2 .

It is a cyclic number.

It is not a de Polignac number, because 354640129 - 2¹ = 354640127 is a prime.

Together with 354640127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 354640094 and 354640103.

It is not a weakly prime, because it can be changed into another prime (354640123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177320064 + 177320065.

It is an arithmetic number, because the mean of its divisors is an integer number (177320065).

Almost surely, 2^354640129 is an apocalyptic number.

It is an amenable number.

354640129 is a deficient number, since it is larger than the sum of its proper divisors (1).

354640129 is an equidigital number, since it uses as much as digits as its factorization.

354640129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 354640129 is about 18831.8912751747. The cubic root of 354640129 is about 707.8305324175.

The spelling of 354640129 in words is "three hundred fifty-four million, six hundred forty thousand, one hundred twenty-nine".