1369969957 has 4 divisors (see below), whose sum is σ = 1370196396. Its totient is φ = 1369743520.

The previous prime is 1369969943. The next prime is 1369969963. The reversal of 1369969957 is 7599699631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 773340481 + 596629476 = 27809^2 + 24426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1369969957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369969927) 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, 103888 + ... + 116329.

It is an arithmetic number, because the mean of its divisors is an integer number (342549099).

Almost surely, 2^1369969957 is an apocalyptic number.

It is an amenable number.

1369969957 is a deficient number, since it is larger than the sum of its proper divisors (226439).

1369969957 is an equidigital number, since it uses as much as digits as its factorization.

1369969957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226438.

The product of its digits is 24800580, while the sum is 64.

The square root of 1369969957 is about 37013.1052061294. The cubic root of 1369969957 is about 1110.6324229322.

The spelling of 1369969957 in words is "one billion, three hundred sixty-nine million, nine hundred sixty-nine thousand, nine hundred fifty-seven".