697226138 has 16 divisors (see below), whose sum is σ = 1196268864. Its totient is φ = 298555200.

The previous prime is 697226137. The next prime is 697226161. The reversal of 697226138 is 831622796.

It is a super-2 number, since 2×697226138² = 972248575020790088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (697226137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3920 + ... + 37547.

It is an arithmetic number, because the mean of its divisors is an integer number (74766804).

Almost surely, 2^697226138 is an apocalyptic number.

697226138 is a deficient number, since it is larger than the sum of its proper divisors (499042726).

697226138 is a wasteful number, since it uses less digits than its factorization.

697226138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42677.

The product of its digits is 217728, while the sum is 44.

The square root of 697226138 is about 26405.0400113312. The cubic root of 697226138 is about 886.7296286029.

The spelling of 697226138 in words is "six hundred ninety-seven million, two hundred twenty-six thousand, one hundred thirty-eight".