68699131 has 4 divisors (see below), whose sum is σ = 70915264. Its totient is φ = 66483000.

The previous prime is 68699129. The next prime is 68699153. The reversal of 68699131 is 13199686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68699131 - 2¹ = 68699129 is a prime.

It is a super-2 number, since 2×68699131² = 9439141200310322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68699171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108020 + ... + 1108081.

It is an arithmetic number, because the mean of its divisors is an integer number (17728816).

Almost surely, 2^68699131 is an apocalyptic number.

68699131 is a deficient number, since it is larger than the sum of its proper divisors (2216133).

68699131 is a wasteful number, since it uses less digits than its factorization.

68699131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216132.

The product of its digits is 69984, while the sum is 43.

The square root of 68699131 is about 8288.4938921375. The cubic root of 68699131 is about 409.5595726644.

The spelling of 68699131 in words is "sixty-eight million, six hundred ninety-nine thousand, one hundred thirty-one".