686949429 has 16 divisors (see below), whose sum is σ = 946391040. Its totient is φ = 442765680.

The previous prime is 686949421. The next prime is 686949433. The reversal of 686949429 is 924949686.

It is not a de Polignac number, because 686949429 - 2³ = 686949421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686949421) 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, 114154 + ... + 120020.

It is an arithmetic number, because the mean of its divisors is an integer number (59149440).

Almost surely, 2^686949429 is an apocalyptic number.

It is an amenable number.

686949429 is a deficient number, since it is larger than the sum of its proper divisors (259441611).

686949429 is a wasteful number, since it uses less digits than its factorization.

686949429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7160.

The product of its digits is 6718464, while the sum is 57.

The square root of 686949429 is about 26209.7201244119. The cubic root of 686949429 is about 882.3514200128.

It can be divided in two parts, 686949 and 429, that added together give a triangular number (687378 = T₁₁₇₂).

The spelling of 686949429 in words is "six hundred eighty-six million, nine hundred forty-nine thousand, four hundred twenty-nine".