475391557 has 2 divisors, whose sum is σ = 475391558. Its totient is φ = 475391556.

The previous prime is 475391509. The next prime is 475391561. The reversal of 475391557 is 755193574.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 471367521 + 4024036 = 21711^2 + 2006^2 .

It is a cyclic number.

It is not a de Polignac number, because 475391557 - 2¹⁵ = 475358789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475301557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237695778 + 237695779.

It is an arithmetic number, because the mean of its divisors is an integer number (237695779).

Almost surely, 2^475391557 is an apocalyptic number.

It is an amenable number.

475391557 is a deficient number, since it is larger than the sum of its proper divisors (1).

475391557 is an equidigital number, since it uses as much as digits as its factorization.

475391557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 661500, while the sum is 46.

The square root of 475391557 is about 21803.4758008901. The cubic root of 475391557 is about 780.4597098309.

The spelling of 475391557 in words is "four hundred seventy-five million, three hundred ninety-one thousand, five hundred fifty-seven".