991087062 has 16 divisors (see below), whose sum is σ = 2265341952. Its totient is φ = 283167720.

The previous prime is 991087061. The next prime is 991087067. The reversal of 991087062 is 260780199.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 23597311 = 991087062 / (9 + 9 + 1 + 0 + 8 + 7 + 0 + 6 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991087061) 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, 11798614 + ... + 11798697.

It is an arithmetic number, because the mean of its divisors is an integer number (141583872).

Almost surely, 2^991087062 is an apocalyptic number.

991087062 is an abundant number, since it is smaller than the sum of its proper divisors (1274254890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

991087062 is a wasteful number, since it uses less digits than its factorization.

991087062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23597323.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 991087062 is about 31481.5352548125. The cubic root of 991087062 is about 997.0201499804.

The spelling of 991087062 in words is "nine hundred ninety-one million, eighty-seven thousand, sixty-two".