380633861 has 2 divisors, whose sum is σ = 380633862. Its totient is φ = 380633860.

The previous prime is 380633801. The next prime is 380633881. The reversal of 380633861 is 168336083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366148225 + 14485636 = 19135^2 + 3806^2 .

It is an emirp because it is prime and its reverse (168336083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 380633861 - 2⁶ = 380633797 is a prime.

It is a super-2 number, since 2×380633861² = 289764272279534642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380633801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190316930 + 190316931.

It is an arithmetic number, because the mean of its divisors is an integer number (190316931).

Almost surely, 2^380633861 is an apocalyptic number.

It is an amenable number.

380633861 is a deficient number, since it is larger than the sum of its proper divisors (1).

380633861 is an equidigital number, since it uses as much as digits as its factorization.

380633861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 380633861 is about 19509.8401069819. The cubic root of 380633861 is about 724.7181534655.

The spelling of 380633861 in words is "three hundred eighty million, six hundred thirty-three thousand, eight hundred sixty-one".