1538879 has 2 divisors, whose sum is σ = 1538880. Its totient is φ = 1538878.

The previous prime is 1538851. The next prime is 1538893. The reversal of 1538879 is 9788351.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1538879 - 2¹² = 1534783 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769439 + 769440.

It is an arithmetic number, because the mean of its divisors is an integer number (769440).

2^1538879 is an apocalyptic number.

1538879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538879 is an equidigital number, since it uses as much as digits as its factorization.

1538879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 1538879 is about 1240.5156186038. The cubic root of 1538879 is about 115.4520080719.

The spelling of 1538879 in words is "one million, five hundred thirty-eight thousand, eight hundred seventy-nine".