3750198421 has 2 divisors, whose sum is σ = 3750198422. Its totient is φ = 3750198420.

The previous prime is 3750198409. The next prime is 3750198451. The reversal of 3750198421 is 1248910573.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1982920900 + 1767277521 = 44530^2 + 42039^2 .

It is an emirp because it is prime and its reverse (1248910573) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3750198421 - 2¹⁹ = 3749674133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3750198451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1875099210 + 1875099211.

It is an arithmetic number, because the mean of its divisors is an integer number (1875099211).

Almost surely, 2^3750198421 is an apocalyptic number.

It is an amenable number.

3750198421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3750198421 is an equidigital number, since it uses as much as digits as its factorization.

3750198421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 3750198421 is about 61238.8636488301. The cubic root of 3750198421 is about 1553.6436542795.

The spelling of 3750198421 in words is "three billion, seven hundred fifty million, one hundred ninety-eight thousand, four hundred twenty-one".