1654979 has 2 divisors, whose sum is σ = 1654980. Its totient is φ = 1654978.

The previous prime is 1654963. The next prime is 1654981. The reversal of 1654979 is 9794561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1654979 - 2⁴ = 1654963 is a prime.

Together with 1654981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1654579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827489 + 827490.

It is an arithmetic number, because the mean of its divisors is an integer number (827490).

2^1654979 is an apocalyptic number.

1654979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1654979 is an equidigital number, since it uses as much as digits as its factorization.

1654979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 1654979 is about 1286.4598711192. The cubic root of 1654979 is about 118.2853145556.

The spelling of 1654979 in words is "one million, six hundred fifty-four thousand, nine hundred seventy-nine".