366977981 has 2 divisors, whose sum is σ = 366977982. Its totient is φ = 366977980.

The previous prime is 366977959. The next prime is 366977983. The reversal of 366977981 is 189779663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276556900 + 90421081 = 16630^2 + 9509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-366977981 is a prime.

It is a super-2 number, since 2×366977981² = 269345677077672722, which contains 22 as substring.

Together with 366977983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (366977983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183488990 + 183488991.

It is an arithmetic number, because the mean of its divisors is an integer number (183488991).

Almost surely, 2^366977981 is an apocalyptic number.

It is an amenable number.

366977981 is a deficient number, since it is larger than the sum of its proper divisors (1).

366977981 is an equidigital number, since it uses as much as digits as its factorization.

366977981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 56.

The square root of 366977981 is about 19156.6693608257. The cubic root of 366977981 is about 715.9455636495.

The spelling of 366977981 in words is "three hundred sixty-six million, nine hundred seventy-seven thousand, nine hundred eighty-one".