1040690691 has 6 divisors (see below), whose sum is σ = 1503219900. Its totient is φ = 693793788.

The previous prime is 1040690681. The next prime is 1040690719. The reversal of 1040690691 is 1960960401.

1040690691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1040690691 - 2⁹ = 1040690179 is a prime.

It is a super-2 number, since 2×1040690691² = 2166074228668114962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1040690611) 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, 57816141 + ... + 57816158.

It is an arithmetic number, because the mean of its divisors is an integer number (250536650).

Almost surely, 2^1040690691 is an apocalyptic number.

1040690691 is a deficient number, since it is larger than the sum of its proper divisors (462529209).

1040690691 is a wasteful number, since it uses less digits than its factorization.

1040690691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115632305 (or 115632302 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1040690691 is about 32259.7379251599. The cubic root of 1040690691 is about 1013.3836426743.

The spelling of 1040690691 in words is "one billion, forty million, six hundred ninety thousand, six hundred ninety-one".