201678349 has 2 divisors, whose sum is σ = 201678350. Its totient is φ = 201678348.

The previous prime is 201678319. The next prime is 201678359. The reversal of 201678349 is 943876102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119902500 + 81775849 = 10950^2 + 9043^2 .

It is a cyclic number.

It is not a de Polignac number, because 201678349 - 2⁵ = 201678317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201678319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100839174 + 100839175.

It is an arithmetic number, because the mean of its divisors is an integer number (100839175).

Almost surely, 2^201678349 is an apocalyptic number.

It is an amenable number.

201678349 is a deficient number, since it is larger than the sum of its proper divisors (1).

201678349 is an equidigital number, since it uses as much as digits as its factorization.

201678349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 201678349 is about 14201.3502527048. The cubic root of 201678349 is about 586.4348337531.

The spelling of 201678349 in words is "two hundred one million, six hundred seventy-eight thousand, three hundred forty-nine".