136429906 has 4 divisors (see below), whose sum is σ = 204644862. Its totient is φ = 68214952.

The previous prime is 136429903. The next prime is 136429939. The reversal of 136429906 is 609924631.

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

It can be written as a sum of positive squares in only one way, i.e., 84805681 + 51624225 = 9209^2 + 7185^2 .

It is a super-2 number, since 2×136429906² = 37226238502337672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (136429903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34107475 + ... + 34107478.

Almost surely, 2^136429906 is an apocalyptic number.

136429906 is a deficient number, since it is larger than the sum of its proper divisors (68214956).

136429906 is an equidigital number, since it uses as much as digits as its factorization.

136429906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68214955.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 136429906 is about 11680.3213140735. The cubic root of 136429906 is about 514.7976155163.

The spelling of 136429906 in words is "one hundred thirty-six million, four hundred twenty-nine thousand, nine hundred six".