551878973 has 8 divisors (see below), whose sum is σ = 586620792. Its totient is φ = 517390336.

The previous prime is 551878949. The next prime is 551878991. The reversal of 551878973 is 379878155.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 190384804 + 361494169 = 13798^2 + 19013^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551878973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551878993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58790 + ... + 67527.

It is an arithmetic number, because the mean of its divisors is an integer number (73327599).

Almost surely, 2^551878973 is an apocalyptic number.

It is an amenable number.

551878973 is a deficient number, since it is larger than the sum of its proper divisors (34741819).

551878973 is a wasteful number, since it uses less digits than its factorization.

551878973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126591.

The product of its digits is 2116800, while the sum is 53.

The square root of 551878973 is about 23492.1044821446. The cubic root of 551878973 is about 820.2532298411.

The spelling of 551878973 in words is "five hundred fifty-one million, eight hundred seventy-eight thousand, nine hundred seventy-three".