1090909345 has 16 divisors (see below), whose sum is σ = 1352916432. Its totient is φ = 843888640.

The previous prime is 1090909333. The next prime is 1090909349. The reversal of 1090909345 is 5439090901.

It can be written as a sum of positive squares in 8 ways, for example, as 92602129 + 998307216 = 9623^2 + 31596^2 .

It is not a de Polignac number, because 1090909345 - 2¹³ = 1090901153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1090909298 and 1090909307.

It is not an unprimeable number, because it can be changed into a prime (1090909349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382 + ... + 46711.

It is an arithmetic number, because the mean of its divisors is an integer number (84557277).

Almost surely, 2^1090909345 is an apocalyptic number.

It is an amenable number.

1090909345 is a deficient number, since it is larger than the sum of its proper divisors (262007087).

1090909345 is a wasteful number, since it uses less digits than its factorization.

1090909345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47252.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 1090909345 is about 33028.9168002827. The cubic root of 1090909345 is about 1029.4285783239.

The spelling of 1090909345 in words is "one billion, ninety million, nine hundred nine thousand, three hundred forty-five".