47391407 has 4 divisors (see below), whose sum is σ = 54161616. Its totient is φ = 40621200.

The previous prime is 47391403. The next prime is 47391419. The reversal of 47391407 is 70419374.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70419374 = 2 ⋅35209687.

It is a cyclic number.

It is not a de Polignac number, because 47391407 - 2² = 47391403 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 (47391401) 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, 3385094 + ... + 3385107.

It is an arithmetic number, because the mean of its divisors is an integer number (13540404).

Almost surely, 2^47391407 is an apocalyptic number.

47391407 is a deficient number, since it is larger than the sum of its proper divisors (6770209).

47391407 is an equidigital number, since it uses as much as digits as its factorization.

47391407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770208.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 47391407 is about 6884.1417039454. The cubic root of 47391407 is about 361.8816269966.

The spelling of 47391407 in words is "forty-seven million, three hundred ninety-one thousand, four hundred seven".