136450921 has 4 divisors (see below), whose sum is σ = 138094992. Its totient is φ = 134806852.

The previous prime is 136450903. The next prime is 136450949. The reversal of 136450921 is 129054631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136450921 - 2⁵ = 136450889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136450981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821911 + ... + 822076.

It is an arithmetic number, because the mean of its divisors is an integer number (34523748).

Almost surely, 2^136450921 is an apocalyptic number.

It is an amenable number.

136450921 is a deficient number, since it is larger than the sum of its proper divisors (1644071).

136450921 is an equidigital number, since it uses as much as digits as its factorization.

136450921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644070.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 136450921 is about 11681.2208694126. The cubic root of 136450921 is about 514.8240464672.

The spelling of 136450921 in words is "one hundred thirty-six million, four hundred fifty thousand, nine hundred twenty-one".