1351979 has 2 divisors, whose sum is σ = 1351980. Its totient is φ = 1351978.

The previous prime is 1351967. The next prime is 1351981. The reversal of 1351979 is 9791531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1351979 is a prime.

Together with 1351981, 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 (1351919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675989 + 675990.

It is an arithmetic number, because the mean of its divisors is an integer number (675990).

2^1351979 is an apocalyptic number.

1351979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351979 is an equidigital number, since it uses as much as digits as its factorization.

1351979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8505, while the sum is 35.

The square root of 1351979 is about 1162.7463179903. The cubic root of 1351979 is about 110.5749237643.

The spelling of 1351979 in words is "one million, three hundred fifty-one thousand, nine hundred seventy-nine".