331402349 has 2 divisors, whose sum is σ = 331402350. Its totient is φ = 331402348.

The previous prime is 331402319. The next prime is 331402363. The reversal of 331402349 is 943204133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304258249 + 27144100 = 17443^2 + 5210^2 .

It is an emirp because it is prime and its reverse (943204133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331402349 - 2¹² = 331398253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331402319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165701174 + 165701175.

It is an arithmetic number, because the mean of its divisors is an integer number (165701175).

Almost surely, 2^331402349 is an apocalyptic number.

It is an amenable number.

331402349 is a deficient number, since it is larger than the sum of its proper divisors (1).

331402349 is an equidigital number, since it uses as much as digits as its factorization.

331402349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 331402349 is about 18204.4595909903. The cubic root of 331402349 is about 692.0198109033.

The spelling of 331402349 in words is "three hundred thirty-one million, four hundred two thousand, three hundred forty-nine".