991495 has 8 divisors (see below), whose sum is σ = 1210320. Its totient is φ = 779520.

The previous prime is 991493. The next prime is 991499. The reversal of 991495 is 594199.

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

It is not a de Polignac number, because 991495 - 2¹ = 991493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991493) 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, 1386 + ... + 1975.

It is an arithmetic number, because the mean of its divisors is an integer number (151290).

2⁹⁹¹⁴⁹⁵ is an apocalyptic number.

991495 is a deficient number, since it is larger than the sum of its proper divisors (218825).

991495 is a wasteful number, since it uses less digits than its factorization.

991495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425.

The product of its digits is 14580, while the sum is 37.

The square root of 991495 is about 995.7384194657. The cubic root of 991495 is about 99.7156924582.

It can be divided in two parts, 991 and 495, that multiplied together give a triangular number (490545 = T₉₉₀).

The spelling of 991495 in words is "nine hundred ninety-one thousand, four hundred ninety-five".