1090208931 has 8 divisors (see below), whose sum is σ = 1661270784. Its totient is φ = 622976520.

The previous prime is 1090208893. The next prime is 1090208941. The reversal of 1090208931 is 1398020901.

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

It is not a de Polignac number, because 1090208931 - 2¹¹ = 1090206883 is a prime.

It is a super-2 number, since 2×1090208931² = 2377111026464325522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1090208892 and 1090208901.

It is not an unprimeable number, because it can be changed into a prime (1090208941) 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, 25957335 + ... + 25957376.

It is an arithmetic number, because the mean of its divisors is an integer number (207658848).

Almost surely, 2^1090208931 is an apocalyptic number.

1090208931 is a deficient number, since it is larger than the sum of its proper divisors (571061853).

1090208931 is an equidigital number, since it uses as much as digits as its factorization.

1090208931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51914721.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1090208931 is about 33018.3120555852. The cubic root of 1090208931 is about 1029.2082176504.

The spelling of 1090208931 in words is "one billion, ninety million, two hundred eight thousand, nine hundred thirty-one".