688013542 has 16 divisors (see below), whose sum is σ = 1055503872. Its totient is φ = 336200200.

The previous prime is 688013533. The next prime is 688013549. The reversal of 688013542 is 245310886.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688013549) 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, 64917 + ... + 74767.

It is an arithmetic number, because the mean of its divisors is an integer number (65968992).

Almost surely, 2^688013542 is an apocalyptic number.

688013542 is a deficient number, since it is larger than the sum of its proper divisors (367490330).

688013542 is a wasteful number, since it uses less digits than its factorization.

688013542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10643.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 688013542 is about 26230.0122378927. The cubic root of 688013542 is about 882.8067845488.

The spelling of 688013542 in words is "six hundred eighty-eight million, thirteen thousand, five hundred forty-two".