136890001 has 4 divisors (see below), whose sum is σ = 144942372. Its totient is φ = 128837632.

The previous prime is 136889969. The next prime is 136890011. The reversal of 136890001 is 100098631.

It is a happy number.

It is a Cunningham number, because it is equal to 11700²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 106584976 + 30305025 = 10324^2 + 5505^2 .

It is a cyclic number.

It is not a de Polignac number, because 136890001 - 2⁵ = 136889969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136890011) 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, 4026160 + ... + 4026193.

It is an arithmetic number, because the mean of its divisors is an integer number (36235593).

Almost surely, 2^136890001 is an apocalyptic number.

It is an amenable number.

136890001 is a deficient number, since it is larger than the sum of its proper divisors (8052371).

136890001 is an equidigital number, since it uses as much as digits as its factorization.

136890001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8052370.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 136890001 is about 11700.0000427350. Note that the first 4 decimals coincide. The cubic root of 136890001 is about 515.3756658298.

The spelling of 136890001 in words is "one hundred thirty-six million, eight hundred ninety thousand, one".