1493658979 has 2 divisors, whose sum is σ = 1493658980. Its totient is φ = 1493658978.

The previous prime is 1493658977. The next prime is 1493659009. The reversal of 1493658979 is 9798563941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1493658979 - 2¹ = 1493658977 is a prime.

Together with 1493658977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1493658977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746829489 + 746829490.

It is an arithmetic number, because the mean of its divisors is an integer number (746829490).

Almost surely, 2^1493658979 is an apocalyptic number.

1493658979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493658979 is an equidigital number, since it uses as much as digits as its factorization.

1493658979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 61.

The square root of 1493658979 is about 38647.8845346029. The cubic root of 1493658979 is about 1143.0989293470.

The spelling of 1493658979 in words is "one billion, four hundred ninety-three million, six hundred fifty-eight thousand, nine hundred seventy-nine".