9000136381 has 4 divisors (see below), whose sum is σ = 9004318812. Its totient is φ = 8995953952.

The previous prime is 9000136357. The next prime is 9000136393. The reversal of 9000136381 is 1836310009.

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 2204772025 + 6795364356 = 46955^2 + 82434^2 .

It is a cyclic number.

It is not a de Polignac number, because 9000136381 - 2⁷ = 9000136253 is a prime.

It is a super-2 number, since 2×9000136381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9000136351) 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, 2087986 + ... + 2092291.

It is an arithmetic number, because the mean of its divisors is an integer number (2251079703).

Almost surely, 2^9000136381 is an apocalyptic number.

It is an amenable number.

9000136381 is a deficient number, since it is larger than the sum of its proper divisors (4182431).

9000136381 is a wasteful number, since it uses less digits than its factorization.

9000136381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182430.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 9000136381 is about 94869.0485933110. The cubic root of 9000136381 is about 2080.0943298104.

The spelling of 9000136381 in words is "nine billion, one hundred thirty-six thousand, three hundred eighty-one".