697905969870 has 128 divisors (see below), whose sum is σ = 1726404005376. Its totient is φ = 180431387136.

The previous prime is 697905969847. The next prime is 697905969877. The reversal of 697905969870 is 78969509796.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 697905969792 and 697905969801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697905969877) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 621465129 + ... + 621466251.

It is an arithmetic number, because the mean of its divisors is an integer number (13487531292).

Almost surely, 2^697905969870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 697905969870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (863202002688).

697905969870 is an abundant number, since it is smaller than the sum of its proper divisors (1028498035506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697905969870 is a wasteful number, since it uses less digits than its factorization.

697905969870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674.

The product of its (nonzero) digits is 462944160, while the sum is 75.

The spelling of 697905969870 in words is "six hundred ninety-seven billion, nine hundred five million, nine hundred sixty-nine thousand, eight hundred seventy".