991374610 has 8 divisors (see below), whose sum is σ = 1784474316. Its totient is φ = 396549840.

The previous prime is 991374569. The next prime is 991374611. The reversal of 991374610 is 16473199.

991374610 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 794168761 + 197205849 = 28181^2 + 14043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (991374611) 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, 49568721 + ... + 49568740.

Almost surely, 2^991374610 is an apocalyptic number.

991374610 is a deficient number, since it is larger than the sum of its proper divisors (793099706).

991374610 is a wasteful number, since it uses less digits than its factorization.

991374610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99137468.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 991374610 is about 31486.1018546279. The cubic root of 991374610 is about 997.1165637868.

The spelling of 991374610 in words is "nine hundred ninety-one million, three hundred seventy-four thousand, six hundred ten".