354388649 has 2 divisors, whose sum is σ = 354388650. Its totient is φ = 354388648.

The previous prime is 354388609. The next prime is 354388651. The reversal of 354388649 is 946883453.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354192400 + 196249 = 18820^2 + 443^2 .

It is a cyclic number.

It is not a de Polignac number, because 354388649 - 2¹⁶ = 354323113 is a prime.

Together with 354388651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 354388597 and 354388606.

It is not a weakly prime, because it can be changed into another prime (354388609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177194324 + 177194325.

It is an arithmetic number, because the mean of its divisors is an integer number (177194325).

Almost surely, 2^354388649 is an apocalyptic number.

It is an amenable number.

354388649 is a deficient number, since it is larger than the sum of its proper divisors (1).

354388649 is an equidigital number, since it uses as much as digits as its factorization.

354388649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 50.

The square root of 354388649 is about 18825.2131196436. The cubic root of 354388649 is about 707.6631821944.

The spelling of 354388649 in words is "three hundred fifty-four million, three hundred eighty-eight thousand, six hundred forty-nine".