1213012979 has 2 divisors, whose sum is σ = 1213012980. Its totient is φ = 1213012978.

The previous prime is 1213012973. The next prime is 1213013059. The reversal of 1213012979 is 9792103121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213012979 - 2⁴ = 1213012963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213012973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606506489 + 606506490.

It is an arithmetic number, because the mean of its divisors is an integer number (606506490).

Almost surely, 2^1213012979 is an apocalyptic number.

1213012979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213012979 is an equidigital number, since it uses as much as digits as its factorization.

1213012979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 1213012979 is about 34828.3358632020. The cubic root of 1213012979 is about 1066.4859766959.

The spelling of 1213012979 in words is "one billion, two hundred thirteen million, twelve thousand, nine hundred seventy-nine".