990387134 has 16 divisors (see below), whose sum is σ = 1641150720. Its totient is φ = 444476760.

The previous prime is 990387133. The next prime is 990387193. The reversal of 990387134 is 431783099.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990387133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283184 + ... + 286659.

It is an arithmetic number, because the mean of its divisors is an integer number (102571920).

Almost surely, 2^990387134 is an apocalyptic number.

990387134 is a deficient number, since it is larger than the sum of its proper divisors (650763586).

990387134 is a wasteful number, since it uses less digits than its factorization.

990387134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569935.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 990387134 is about 31470.4168068998. The cubic root of 990387134 is about 996.7853886804.

The spelling of 990387134 in words is "nine hundred ninety million, three hundred eighty-seven thousand, one hundred thirty-four".