366420991 has 2 divisors, whose sum is σ = 366420992. Its totient is φ = 366420990.

The previous prime is 366420983. The next prime is 366421007. The reversal of 366420991 is 199024663.

It is a weak prime.

It is an emirp because it is prime and its reverse (199024663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 366420991 - 2³ = 366420983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (366420391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183210495 + 183210496.

It is an arithmetic number, because the mean of its divisors is an integer number (183210496).

Almost surely, 2^366420991 is an apocalyptic number.

366420991 is a deficient number, since it is larger than the sum of its proper divisors (1).

366420991 is an equidigital number, since it uses as much as digits as its factorization.

366420991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 366420991 is about 19142.1260835885. The cubic root of 366420991 is about 715.5831654854.

The spelling of 366420991 in words is "three hundred sixty-six million, four hundred twenty thousand, nine hundred ninety-one".