697386149 has 2 divisors, whose sum is σ = 697386150. Its totient is φ = 697386148.

The previous prime is 697386143. The next prime is 697386187. The reversal of 697386149 is 941683796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 504676225 + 192709924 = 22465^2 + 13882^2 .

It is a cyclic number.

It is not a de Polignac number, because 697386149 - 2²⁴ = 680608933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 697386149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697386143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348693074 + 348693075.

It is an arithmetic number, because the mean of its divisors is an integer number (348693075).

Almost surely, 2^697386149 is an apocalyptic number.

It is an amenable number.

697386149 is a deficient number, since it is larger than the sum of its proper divisors (1).

697386149 is an equidigital number, since it uses as much as digits as its factorization.

697386149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 697386149 is about 26408.0697704319. The cubic root of 697386149 is about 886.7974572141.

The spelling of 697386149 in words is "six hundred ninety-seven million, three hundred eighty-six thousand, one hundred forty-nine".