551742939 has 36 divisors (see below), whose sum is σ = 927560088. Its totient is φ = 314709120.

The previous prime is 551742937. The next prime is 551742943. The reversal of 551742939 is 939247155.

It is a happy number.

551742939 is a `hidden beast` number, since 5 + 517 + 42 + 93 + 9 = 666.

It is not a de Polignac number, because 551742939 - 2¹ = 551742937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551742894 and 551742903.

It is not an unprimeable number, because it can be changed into a prime (551742931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3612 + ... + 33414.

It is an arithmetic number, because the mean of its divisors is an integer number (25765558).

Almost surely, 2^551742939 is an apocalyptic number.

551742939 is a deficient number, since it is larger than the sum of its proper divisors (375817149).

551742939 is a wasteful number, since it uses less digits than its factorization.

551742939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29848 (or 29834 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 551742939 is about 23489.2089905131. The cubic root of 551742939 is about 820.1858288935.

The spelling of 551742939 in words is "five hundred fifty-one million, seven hundred forty-two thousand, nine hundred thirty-nine".