501670397 has 2 divisors, whose sum is σ = 501670398. Its totient is φ = 501670396.

The previous prime is 501670373. The next prime is 501670423. The reversal of 501670397 is 793076105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284225881 + 217444516 = 16859^2 + 14746^2 .

It is a cyclic number.

It is not a de Polignac number, because 501670397 - 2¹⁸ = 501408253 is a prime.

It is a super-2 number, since 2×501670397² = 503346374452275218, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 501670397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501670327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250835198 + 250835199.

It is an arithmetic number, because the mean of its divisors is an integer number (250835199).

Almost surely, 2^501670397 is an apocalyptic number.

It is an amenable number.

501670397 is a deficient number, since it is larger than the sum of its proper divisors (1).

501670397 is an equidigital number, since it uses as much as digits as its factorization.

501670397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 501670397 is about 22397.9998437360. Note that the first 3 decimals coincide. The cubic root of 501670397 is about 794.5834068568.

The spelling of 501670397 in words is "five hundred one million, six hundred seventy thousand, three hundred ninety-seven".