999474551 has 2 divisors, whose sum is σ = 999474552. Its totient is φ = 999474550.

The previous prime is 999474521. The next prime is 999474643. The reversal of 999474551 is 155474999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999474551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999474493 and 999474502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999474521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499737275 + 499737276.

It is an arithmetic number, because the mean of its divisors is an integer number (499737276).

Almost surely, 2^999474551 is an apocalyptic number.

999474551 is a deficient number, since it is larger than the sum of its proper divisors (1).

999474551 is an equidigital number, since it uses as much as digits as its factorization.

999474551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 53.

The square root of 999474551 is about 31614.4674318578. The cubic root of 999474551 is about 999.8248196470.

The spelling of 999474551 in words is "nine hundred ninety-nine million, four hundred seventy-four thousand, five hundred fifty-one".