996899551 has 2 divisors, whose sum is σ = 996899552. Its totient is φ = 996899550.

The previous prime is 996899531. The next prime is 996899623. The reversal of 996899551 is 155998699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 996899551 - 2¹³ = 996891359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 996899551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996899531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498449775 + 498449776.

It is an arithmetic number, because the mean of its divisors is an integer number (498449776).

Almost surely, 2^996899551 is an apocalyptic number.

996899551 is a deficient number, since it is larger than the sum of its proper divisors (1).

996899551 is an equidigital number, since it uses as much as digits as its factorization.

996899551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7873200, while the sum is 61.

The square root of 996899551 is about 31573.7161417531. The cubic root of 996899551 is about 998.9654470693.

The spelling of 996899551 in words is "nine hundred ninety-six million, eight hundred ninety-nine thousand, five hundred fifty-one".