366261421 has 2 divisors, whose sum is σ = 366261422. Its totient is φ = 366261420.

The previous prime is 366261403. The next prime is 366261443. The reversal of 366261421 is 124162663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306740196 + 59521225 = 17514^2 + 7715^2 .

It is a cyclic number.

It is not a de Polignac number, because 366261421 - 2¹³ = 366253229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (366261121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183130710 + 183130711.

It is an arithmetic number, because the mean of its divisors is an integer number (183130711).

Almost surely, 2^366261421 is an apocalyptic number.

It is an amenable number.

366261421 is a deficient number, since it is larger than the sum of its proper divisors (1).

366261421 is an equidigital number, since it uses as much as digits as its factorization.

366261421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 366261421 is about 19137.9575974031. The cubic root of 366261421 is about 715.4792757085.

The spelling of 366261421 in words is "three hundred sixty-six million, two hundred sixty-one thousand, four hundred twenty-one".