2053866691 has 2 divisors, whose sum is σ = 2053866692. Its totient is φ = 2053866690.

The previous prime is 2053866671. The next prime is 2053866721. The reversal of 2053866691 is 1966683502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2053866691 - 2⁹ = 2053866179 is a prime.

It is not a weakly prime, because it can be changed into another prime (2053866631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026933345 + 1026933346.

It is an arithmetic number, because the mean of its divisors is an integer number (1026933346).

Almost surely, 2^2053866691 is an apocalyptic number.

2053866691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2053866691 is an equidigital number, since it uses as much as digits as its factorization.

2053866691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 2053866691 is about 45319.6060331508. The cubic root of 2053866691 is about 1271.1322885968.

The spelling of 2053866691 in words is "two billion, fifty-three million, eight hundred sixty-six thousand, six hundred ninety-one".