1547879 has 2 divisors, whose sum is σ = 1547880. Its totient is φ = 1547878.

The previous prime is 1547857. The next prime is 1547881. The reversal of 1547879 is 9787451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1547879 - 2¹⁶ = 1482343 is a prime.

It is a Sophie Germain prime.

Together with 1547881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1547839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 773939 + 773940.

It is an arithmetic number, because the mean of its divisors is an integer number (773940).

2^1547879 is an apocalyptic number.

1547879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1547879 is an equidigital number, since it uses as much as digits as its factorization.

1547879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 1547879 is about 1244.1378540982. The cubic root of 1547879 is about 115.6766410668.

Adding to 1547879 its sum of digits (41), we get a triangular number (1547920 = T₁₇₅₉).

The spelling of 1547879 in words is "one million, five hundred forty-seven thousand, eight hundred seventy-nine".