371772421 has 2 divisors, whose sum is σ = 371772422. Its totient is φ = 371772420.

The previous prime is 371772413. The next prime is 371772451. The reversal of 371772421 is 124277173.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358913025 + 12859396 = 18945^2 + 3586^2 .

It is an emirp because it is prime and its reverse (124277173) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 371772421 - 2³ = 371772413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (371772451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185886210 + 185886211.

It is an arithmetic number, because the mean of its divisors is an integer number (185886211).

Almost surely, 2^371772421 is an apocalyptic number.

It is an amenable number.

371772421 is a deficient number, since it is larger than the sum of its proper divisors (1).

371772421 is an equidigital number, since it uses as much as digits as its factorization.

371772421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16464, while the sum is 34.

The square root of 371772421 is about 19281.4009086477. The cubic root of 371772421 is about 719.0499435609.

The spelling of 371772421 in words is "three hundred seventy-one million, seven hundred seventy-two thousand, four hundred twenty-one".