1662753979 has 2 divisors, whose sum is σ = 1662753980. Its totient is φ = 1662753978.

The previous prime is 1662753959. The next prime is 1662753997. The reversal of 1662753979 is 9793572661.

Together with next prime (1662753997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1662753979 - 2¹⁹ = 1662229691 is a prime.

It is not a weakly prime, because it can be changed into another prime (1662753949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831376989 + 831376990.

It is an arithmetic number, because the mean of its divisors is an integer number (831376990).

Almost surely, 2^1662753979 is an apocalyptic number.

1662753979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662753979 is an equidigital number, since it uses as much as digits as its factorization.

1662753979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4286520, while the sum is 55.

The square root of 1662753979 is about 40776.8804471357. The cubic root of 1662753979 is about 1184.7025736717.

The spelling of 1662753979 in words is "one billion, six hundred sixty-two million, seven hundred fifty-three thousand, nine hundred seventy-nine".