47921393 has 16 divisors (see below), whose sum is σ = 53739840. Its totient is φ = 42444864.

The previous prime is 47921387. The next prime is 47921399. The reversal of 47921393 is 39312974.

It is an interprime number because it is at equal distance from previous prime (47921387) and next prime (47921399).

It is a cyclic number.

It is not a de Polignac number, because 47921393 - 2²⁰ = 46872817 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47921399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32255 + ... + 33707.

It is an arithmetic number, because the mean of its divisors is an integer number (3358740).

Almost surely, 2^47921393 is an apocalyptic number.

47921393 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

47921393 is a deficient number, since it is larger than the sum of its proper divisors (5818447).

47921393 is a wasteful number, since it uses less digits than its factorization.

47921393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568.

The product of its digits is 40824, while the sum is 38.

The square root of 47921393 is about 6922.5279342159. The cubic root of 47921393 is about 363.2256235076.

It can be divided in two parts, 47 and 921393, that multiplied together give a triangular number (43305471 = T₉₃₀₆).

The spelling of 47921393 in words is "forty-seven million, nine hundred twenty-one thousand, three hundred ninety-three".