308373421 has 4 divisors (see below), whose sum is σ = 326513052. Its totient is φ = 290233792.

The previous prime is 308373409. The next prime is 308373427. The reversal of 308373421 is 124373803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124373803 = 389 ⋅319727.

It can be written as a sum of positive squares in 2 ways, for example, as 252333225 + 56040196 = 15885^2 + 7486^2 .

It is not a de Polignac number, because 308373421 - 2⁷ = 308373293 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 (308373427) 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, 9069790 + ... + 9069823.

It is an arithmetic number, because the mean of its divisors is an integer number (81628263).

Almost surely, 2^308373421 is an apocalyptic number.

It is an amenable number.

308373421 is a deficient number, since it is larger than the sum of its proper divisors (18139631).

308373421 is a wasteful number, since it uses less digits than its factorization.

308373421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18139630.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 308373421 is about 17560.5643702018. The cubic root of 308373421 is about 675.6041566667.

The spelling of 308373421 in words is "three hundred eight million, three hundred seventy-three thousand, four hundred twenty-one".