697221385 has 8 divisors (see below), whose sum is σ = 956189376. Its totient is φ = 478094640.

The previous prime is 697221367. The next prime is 697221407. The reversal of 697221385 is 583122796.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 697221385 - 2¹¹ = 697219337 is a prime.

It is a super-2 number, since 2×697221385² = 972235319402636450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9960271 + ... + 9960340.

It is an arithmetic number, because the mean of its divisors is an integer number (119523672).

Almost surely, 2^697221385 is an apocalyptic number.

It is an amenable number.

697221385 is a deficient number, since it is larger than the sum of its proper divisors (258967991).

697221385 is a wasteful number, since it uses less digits than its factorization.

697221385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19920623.

The product of its digits is 181440, while the sum is 43.

The square root of 697221385 is about 26404.9500094206. The cubic root of 697221385 is about 886.7276136490.

The spelling of 697221385 in words is "six hundred ninety-seven million, two hundred twenty-one thousand, three hundred eighty-five".