523126378 has 4 divisors (see below), whose sum is σ = 784689570. Its totient is φ = 261563188.

The previous prime is 523126343. The next prime is 523126379. The reversal of 523126378 is 873621325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 522442449 + 683929 = 22857^2 + 827^2 .

It is a super-2 number, since 2×523126378² = 547322414718797768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (523126379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130781593 + ... + 130781596.

Almost surely, 2^523126378 is an apocalyptic number.

523126378 is a deficient number, since it is larger than the sum of its proper divisors (261563192).

523126378 is a wasteful number, since it uses less digits than its factorization.

523126378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261563191.

The product of its digits is 60480, while the sum is 37.

The square root of 523126378 is about 22871.9561472122. The cubic root of 523126378 is about 805.7535107376.

The spelling of 523126378 in words is "five hundred twenty-three million, one hundred twenty-six thousand, three hundred seventy-eight".