193402421 has 8 divisors (see below), whose sum is σ = 211840920. Its totient is φ = 175748608.

The previous prime is 193402399. The next prime is 193402427. The reversal of 193402421 is 124204391.

193402421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7761796 + 185640625 = 2786^2 + 13625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 193402421 - 2⁶ = 193402357 is a prime.

It is a super-2 number, since 2×193402421² = 74808992897322482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193402427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195656 + ... + 196641.

It is an arithmetic number, because the mean of its divisors is an integer number (26480115).

Almost surely, 2^193402421 is an apocalyptic number.

It is an amenable number.

193402421 is a deficient number, since it is larger than the sum of its proper divisors (18438499).

193402421 is a wasteful number, since it uses less digits than its factorization.

193402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392343.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 193402421 is about 13906.9198962243. The cubic root of 193402421 is about 578.3010339068.

The spelling of 193402421 in words is "one hundred ninety-three million, four hundred two thousand, four hundred twenty-one".