386057261 has 2 divisors, whose sum is σ = 386057262. Its totient is φ = 386057260.

The previous prime is 386057213. The next prime is 386057263. The reversal of 386057261 is 162750683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288660100 + 97397161 = 16990^2 + 9869^2 .

It is a cyclic number.

It is not a de Polignac number, because 386057261 - 2²⁶ = 318948397 is a prime.

It is a Sophie Germain prime.

Together with 386057263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386057263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193028630 + 193028631.

It is an arithmetic number, because the mean of its divisors is an integer number (193028631).

Almost surely, 2^386057261 is an apocalyptic number.

It is an amenable number.

386057261 is a deficient number, since it is larger than the sum of its proper divisors (1).

386057261 is an equidigital number, since it uses as much as digits as its factorization.

386057261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 386057261 is about 19648.3399044296. The cubic root of 386057261 is about 728.1439438077.

The spelling of 386057261 in words is "three hundred eighty-six million, fifty-seven thousand, two hundred sixty-one".