475239997 has 2 divisors, whose sum is σ = 475239998. Its totient is φ = 475239996.

The previous prime is 475239977. The next prime is 475240021. The reversal of 475239997 is 799932574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 262634436 + 212605561 = 16206^2 + 14581^2 .

It is a cyclic number.

It is not a de Polignac number, because 475239997 - 2¹¹ = 475237949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475239967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237619998 + 237619999.

It is an arithmetic number, because the mean of its divisors is an integer number (237619999).

Almost surely, 2^475239997 is an apocalyptic number.

It is an amenable number.

475239997 is a deficient number, since it is larger than the sum of its proper divisors (1).

475239997 is an equidigital number, since it uses as much as digits as its factorization.

475239997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4286520, while the sum is 55.

The square root of 475239997 is about 21799.9999311927. Note that the first 4 decimals coincide. The cubic root of 475239997 is about 780.3767613333.

The spelling of 475239997 in words is "four hundred seventy-five million, two hundred thirty-nine thousand, nine hundred ninety-seven".