1369457779 has 2 divisors, whose sum is σ = 1369457780. Its totient is φ = 1369457778.

The previous prime is 1369457759. The next prime is 1369457783. The reversal of 1369457779 is 9777549631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1369457779 - 2¹⁹ = 1368933491 is a prime.

It is a super-2 number, since 2×1369457779² = 3750829216927225682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1369457759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684728889 + 684728890.

It is an arithmetic number, because the mean of its divisors is an integer number (684728890).

Almost surely, 2^1369457779 is an apocalyptic number.

1369457779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1369457779 is an equidigital number, since it uses as much as digits as its factorization.

1369457779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10001880, while the sum is 58.

The square root of 1369457779 is about 37006.1856856391. The cubic root of 1369457779 is about 1110.4939983889.

The spelling of 1369457779 in words is "one billion, three hundred sixty-nine million, four hundred fifty-seven thousand, seven hundred seventy-nine".