686425901 has 16 divisors (see below), whose sum is σ = 852418560. Its totient is φ = 539414640.

The previous prime is 686425879. The next prime is 686425933. The reversal of 686425901 is 109524686.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 686425901 - 2¹⁰ = 686424877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686425301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79121 + ... + 87366.

It is an arithmetic number, because the mean of its divisors is an integer number (53276160).

Almost surely, 2^686425901 is an apocalyptic number.

It is an amenable number.

686425901 is a deficient number, since it is larger than the sum of its proper divisors (165992659).

686425901 is a wasteful number, since it uses less digits than its factorization.

686425901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166544.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 686425901 is about 26199.7309337329. The cubic root of 686425901 is about 882.1272147306.

The spelling of 686425901 in words is "six hundred eighty-six million, four hundred twenty-five thousand, nine hundred one".