90200000731 has 4 divisors (see below), whose sum is σ = 90334028152. Its totient is φ = 90065973312.

The previous prime is 90200000729. The next prime is 90200000741. The reversal of 90200000731 is 13700000209.

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

It is a cyclic number.

It is not a de Polignac number, because 90200000731 - 2¹ = 90200000729 is a prime.

It is a super-2 number, since 2×90200000731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90200000741) 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, 67012701 + ... + 67014046.

It is an arithmetic number, because the mean of its divisors is an integer number (22583507038).

Almost surely, 2^90200000731 is an apocalyptic number.

90200000731 is a deficient number, since it is larger than the sum of its proper divisors (134027421).

90200000731 is a wasteful number, since it uses less digits than its factorization.

90200000731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134027420.

The product of its (nonzero) digits is 378, while the sum is 22.

The spelling of 90200000731 in words is "ninety billion, two hundred million, seven hundred thirty-one", and thus it is an aban number.