1090785131 has 6 divisors (see below), whose sum is σ = 1094058420. Its totient is φ = 1087521596.

The previous prime is 1090785121. The next prime is 1090785187. The reversal of 1090785131 is 1315870901.

It is not a de Polignac number, because 1090785131 - 2¹⁴ = 1090768747 is a prime.

It is a super-2 number, since 2×1090785131² = 2379624404021374322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1090785091 and 1090785100.

It is not an unprimeable number, because it can be changed into a prime (1090785121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115880 + ... + 124938.

It is an arithmetic number, because the mean of its divisors is an integer number (182343070).

Almost surely, 2^1090785131 is an apocalyptic number.

1090785131 is a deficient number, since it is larger than the sum of its proper divisors (3273289).

1090785131 is an frugal number, since it uses more digits than its factorization.

1090785131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9753 (or 9406 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 35.

The square root of 1090785131 is about 33027.0363641669. The cubic root of 1090785131 is about 1029.3895056317.

The spelling of 1090785131 in words is "one billion, ninety million, seven hundred eighty-five thousand, one hundred thirty-one".