75921047 has 2 divisors, whose sum is σ = 75921048. Its totient is φ = 75921046.

The previous prime is 75921029. The next prime is 75921049. The reversal of 75921047 is 74012957.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75921047 - 2¹⁴ = 75904663 is a prime.

Together with 75921049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 75920998 and 75921016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75921049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37960523 + 37960524.

It is an arithmetic number, because the mean of its divisors is an integer number (37960524).

Almost surely, 2^75921047 is an apocalyptic number.

75921047 is a deficient number, since it is larger than the sum of its proper divisors (1).

75921047 is an equidigital number, since it uses as much as digits as its factorization.

75921047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 75921047 is about 8713.2684453080. The cubic root of 75921047 is about 423.4356273488.

The spelling of 75921047 in words is "seventy-five million, nine hundred twenty-one thousand, forty-seven".