1997846479 has 2 divisors, whose sum is σ = 1997846480. Its totient is φ = 1997846478.

The previous prime is 1997846467. The next prime is 1997846507. The reversal of 1997846479 is 9746487991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1997846479 - 2¹⁵ = 1997813711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1997846479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1997846419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998923239 + 998923240.

It is an arithmetic number, because the mean of its divisors is an integer number (998923240).

Almost surely, 2^1997846479 is an apocalyptic number.

1997846479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997846479 is an equidigital number, since it uses as much as digits as its factorization.

1997846479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 64.

The square root of 1997846479 is about 44697.2759684525. The cubic root of 1997846479 is about 1259.4686764168.

The spelling of 1997846479 in words is "one billion, nine hundred ninety-seven million, eight hundred forty-six thousand, four hundred seventy-nine".