1370202109 has 2 divisors, whose sum is σ = 1370202110. Its totient is φ = 1370202108.

The previous prime is 1370202107. The next prime is 1370202131. The reversal of 1370202109 is 9012020731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1369222009 + 980100 = 37003^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 1370202109 - 2¹ = 1370202107 is a prime.

Together with 1370202107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1370202107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685101054 + 685101055.

It is an arithmetic number, because the mean of its divisors is an integer number (685101055).

Almost surely, 2^1370202109 is an apocalyptic number.

It is an amenable number.

1370202109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1370202109 is an equidigital number, since it uses as much as digits as its factorization.

1370202109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1370202109 is about 37016.2411516891. The cubic root of 1370202109 is about 1110.6951544722.

It can be divided in two parts, 137020 and 2109, that added together give a square (139129 = 373²).

The spelling of 1370202109 in words is "one billion, three hundred seventy million, two hundred two thousand, one hundred nine".