1369721677 has 4 divisors (see below), whose sum is σ = 1370200320. Its totient is φ = 1369243036.

The previous prime is 1369721627. The next prime is 1369721681. The reversal of 1369721677 is 7761279631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1369721677 - 2¹¹ = 1369719629 is a prime.

It is a super-2 number, since 2×1369721677² = 3752274944887384658, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1369721677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369721627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235003 + ... + 240760.

It is an arithmetic number, because the mean of its divisors is an integer number (342550080).

Almost surely, 2^1369721677 is an apocalyptic number.

It is an amenable number.

1369721677 is a deficient number, since it is larger than the sum of its proper divisors (478643).

1369721677 is an equidigital number, since it uses as much as digits as its factorization.

1369721677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478642.

The product of its digits is 666792, while the sum is 49.

The square root of 1369721677 is about 37009.7511069718. The cubic root of 1369721677 is about 1110.5653254809.

The spelling of 1369721677 in words is "one billion, three hundred sixty-nine million, seven hundred twenty-one thousand, six hundred seventy-seven".