1369740121 has 2 divisors, whose sum is σ = 1369740122. Its totient is φ = 1369740120.

The previous prime is 1369740089. The next prime is 1369740131. The reversal of 1369740121 is 1210479631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 745290000 + 624450121 = 27300^2 + 24989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1369740121 - 2⁵ = 1369740089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1369740131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684870060 + 684870061.

It is an arithmetic number, because the mean of its divisors is an integer number (684870061).

Almost surely, 2^1369740121 is an apocalyptic number.

It is an amenable number.

1369740121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1369740121 is an equidigital number, since it uses as much as digits as its factorization.

1369740121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1369740121 is about 37010.0002837071. Note that the first 3 decimals coincide. The cubic root of 1369740121 is about 1110.5703102344.

The spelling of 1369740121 in words is "one billion, three hundred sixty-nine million, seven hundred forty thousand, one hundred twenty-one".