697941909 has 12 divisors (see below), whose sum is σ = 1152158176. Its totient is φ = 398823912.

The previous prime is 697941889. The next prime is 697941917. The reversal of 697941909 is 909149796.

It is not a de Polignac number, because 697941909 - 2⁸ = 697941653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697941929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5539159 + ... + 5539284.

Almost surely, 2^697941909 is an apocalyptic number.

It is an amenable number.

697941909 is a deficient number, since it is larger than the sum of its proper divisors (454216267).

697941909 is a wasteful number, since it uses less digits than its factorization.

697941909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11078456 (or 11078453 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 697941909 is about 26418.5902159824. The cubic root of 697941909 is about 887.0329631309.

The spelling of 697941909 in words is "six hundred ninety-seven million, nine hundred forty-one thousand, nine hundred nine".