688968901 has 4 divisors (see below), whose sum is σ = 700646400. Its totient is φ = 677291404.

The previous prime is 688968859. The next prime is 688968923. The reversal of 688968901 is 109869886.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 688968901 - 2¹¹ = 688966853 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 (688968001) 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, 5838661 + ... + 5838778.

It is an arithmetic number, because the mean of its divisors is an integer number (175161600).

Almost surely, 2^688968901 is an apocalyptic number.

It is an amenable number.

688968901 is a deficient number, since it is larger than the sum of its proper divisors (11677499).

688968901 is a wasteful number, since it uses less digits than its factorization.

688968901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11677498.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 688968901 is about 26248.2171013576. The cubic root of 688968901 is about 883.2152102955.

The spelling of 688968901 in words is "six hundred eighty-eight million, nine hundred sixty-eight thousand, nine hundred one".