697145213 has 4 divisors (see below), whose sum is σ = 699372828. Its totient is φ = 694917600.

The previous prime is 697145179. The next prime is 697145227. The reversal of 697145213 is 312541796.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12694969 + 684450244 = 3563^2 + 26162^2 .

It is a cyclic number.

It is not a de Polignac number, because 697145213 - 2²⁴ = 680367997 is a prime.

It is a super-2 number, since 2×697145213² = 972022896017630738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697145243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113338 + ... + 1113963.

It is an arithmetic number, because the mean of its divisors is an integer number (174843207).

Almost surely, 2^697145213 is an apocalyptic number.

It is an amenable number.

697145213 is a deficient number, since it is larger than the sum of its proper divisors (2227615).

697145213 is a wasteful number, since it uses less digits than its factorization.

697145213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227614.

The product of its digits is 45360, while the sum is 38.

The square root of 697145213 is about 26403.5075889549. The cubic root of 697145213 is about 886.6953205701.

The spelling of 697145213 in words is "six hundred ninety-seven million, one hundred forty-five thousand, two hundred thirteen".