938451421 has 4 divisors (see below), whose sum is σ = 938689632. Its totient is φ = 938213212.

The previous prime is 938451403. The next prime is 938451433. The reversal of 938451421 is 124154839.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124154839 = 463 ⋅268153.

It is a cyclic number.

It is not a de Polignac number, because 938451421 - 2¹⁷ = 938320349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938451121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113095 + ... + 121108.

It is an arithmetic number, because the mean of its divisors is an integer number (234672408).

Almost surely, 2^938451421 is an apocalyptic number.

It is an amenable number.

938451421 is a deficient number, since it is larger than the sum of its proper divisors (238211).

938451421 is a wasteful number, since it uses less digits than its factorization.

938451421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238210.

The product of its digits is 34560, while the sum is 37.

The square root of 938451421 is about 30634.1544848230. The cubic root of 938451421 is about 979.0478816698.

It can be divided in two parts, 93845 and 1421, that added together give a triangular number (95266 = T₄₃₆).

The spelling of 938451421 in words is "nine hundred thirty-eight million, four hundred fifty-one thousand, four hundred twenty-one".