694368149 has 2 divisors, whose sum is σ = 694368150. Its totient is φ = 694368148.

The previous prime is 694368133. The next prime is 694368151. The reversal of 694368149 is 941863496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463540900 + 230827249 = 21530^2 + 15193^2 .

It is a cyclic number.

It is not a de Polignac number, because 694368149 - 2⁴ = 694368133 is a prime.

Together with 694368151, 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 = 694368097 and 694368106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694368119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347184074 + 347184075.

It is an arithmetic number, because the mean of its divisors is an integer number (347184075).

Almost surely, 2^694368149 is an apocalyptic number.

It is an amenable number.

694368149 is a deficient number, since it is larger than the sum of its proper divisors (1).

694368149 is an equidigital number, since it uses as much as digits as its factorization.

694368149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 50.

The square root of 694368149 is about 26350.8661906967. The cubic root of 694368149 is about 885.5163760613.

The spelling of 694368149 in words is "six hundred ninety-four million, three hundred sixty-eight thousand, one hundred forty-nine".