136821707 has 8 divisors (see below), whose sum is σ = 149367360. Its totient is φ = 124293960.

The previous prime is 136821703. The next prime is 136821709. The reversal of 136821707 is 707128631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136821707 - 2² = 136821703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136821703) 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, 15344 + ... + 22562.

It is an arithmetic number, because the mean of its divisors is an integer number (18670920).

Almost surely, 2^136821707 is an apocalyptic number.

136821707 is a deficient number, since it is larger than the sum of its proper divisors (12545653).

136821707 is a wasteful number, since it uses less digits than its factorization.

136821707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8953.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 136821707 is about 11697.0811316328. The cubic root of 136821707 is about 515.2899451287.

The spelling of 136821707 in words is "one hundred thirty-six million, eight hundred twenty-one thousand, seven hundred seven".