991499270 has 16 divisors (see below), whose sum is σ = 1846240560. Its totient is φ = 382923744.

The previous prime is 991499261. The next prime is 991499281. The reversal of 991499270 is 72994199.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1709192 + ... + 1709771.

It is an arithmetic number, because the mean of its divisors is an integer number (115390035).

Almost surely, 2^991499270 is an apocalyptic number.

991499270 is a deficient number, since it is larger than the sum of its proper divisors (854741290).

991499270 is a wasteful number, since it uses less digits than its factorization.

991499270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418999.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 991499270 is about 31488.0813959822. The cubic root of 991499270 is about 997.1583560416.

The spelling of 991499270 in words is "nine hundred ninety-one million, four hundred ninety-nine thousand, two hundred seventy".