1390142069 has 2 divisors, whose sum is σ = 1390142070. Its totient is φ = 1390142068.

The previous prime is 1390141979. The next prime is 1390142081. The reversal of 1390142069 is 9602410931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189353169 + 200788900 = 34487^2 + 14170^2 .

It is a cyclic number.

It is not a de Polignac number, because 1390142069 - 2¹⁶ = 1390076533 is a prime.

It is a super-2 number, since 2×1390142069² = 3864989944007201522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390142669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695071034 + 695071035.

It is an arithmetic number, because the mean of its divisors is an integer number (695071035).

Almost surely, 2^1390142069 is an apocalyptic number.

It is an amenable number.

1390142069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390142069 is an equidigital number, since it uses as much as digits as its factorization.

1390142069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1390142069 is about 37284.6090096168. The cubic root of 1390142069 is about 1116.0570506178.

The spelling of 1390142069 in words is "one billion, three hundred ninety million, one hundred forty-two thousand, sixty-nine".