523051387 has 2 divisors, whose sum is σ = 523051388. Its totient is φ = 523051386.

The previous prime is 523051381. The next prime is 523051469. The reversal of 523051387 is 783150325.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 523051387 - 2⁷ = 523051259 is a prime.

It is not a weakly prime, because it can be changed into another prime (523051381) 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 as a sum of consecutive naturals, namely, 261525693 + 261525694.

It is an arithmetic number, because the mean of its divisors is an integer number (261525694).

Almost surely, 2^523051387 is an apocalyptic number.

523051387 is a deficient number, since it is larger than the sum of its proper divisors (1).

523051387 is an equidigital number, since it uses as much as digits as its factorization.

523051387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 523051387 is about 22870.3167227741. The cubic root of 523051387 is about 805.7150068811.

It can be divided in two parts, 52305 and 1387, that multiplied together give a triangular number (72547035 = T₁₂₀₄₅).

The spelling of 523051387 in words is "five hundred twenty-three million, fifty-one thousand, three hundred eighty-seven".