553378691 has 2 divisors, whose sum is σ = 553378692. Its totient is φ = 553378690.

The previous prime is 553378687. The next prime is 553378703. The reversal of 553378691 is 196873355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 553378691 - 2² = 553378687 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (553678691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276689345 + 276689346.

It is an arithmetic number, because the mean of its divisors is an integer number (276689346).

Almost surely, 2^553378691 is an apocalyptic number.

553378691 is a deficient number, since it is larger than the sum of its proper divisors (1).

553378691 is an equidigital number, since it uses as much as digits as its factorization.

553378691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The square root of 553378691 is about 23524.0024443121. The cubic root of 553378691 is about 820.9955640441.

The spelling of 553378691 in words is "five hundred fifty-three million, three hundred seventy-eight thousand, six hundred ninety-one".