1390851109 has 2 divisors, whose sum is σ = 1390851110. Its totient is φ = 1390851108.

The previous prime is 1390851067. The next prime is 1390851151. The reversal of 1390851109 is 9011580931.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1390851067) and next prime (1390851151).

It can be written as a sum of positive squares in only one way, i.e., 1368260100 + 22591009 = 36990^2 + 4753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390851109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390851409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695425554 + 695425555.

It is an arithmetic number, because the mean of its divisors is an integer number (695425555).

Almost surely, 2^1390851109 is an apocalyptic number.

It is an amenable number.

1390851109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390851109 is an equidigital number, since it uses as much as digits as its factorization.

1390851109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 37.

The square root of 1390851109 is about 37294.1162785767. The cubic root of 1390851109 is about 1116.2467661412.

The spelling of 1390851109 in words is "one billion, three hundred ninety million, eight hundred fifty-one thousand, one hundred nine".