1390137811 has 2 divisors, whose sum is σ = 1390137812. Its totient is φ = 1390137810.

The previous prime is 1390137781. The next prime is 1390137851. The reversal of 1390137811 is 1187310931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1390137811 - 2¹³ = 1390129619 is a prime.

It is not a weakly prime, because it can be changed into another prime (1390137851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695068905 + 695068906.

It is an arithmetic number, because the mean of its divisors is an integer number (695068906).

Almost surely, 2^1390137811 is an apocalyptic number.

1390137811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390137811 is an equidigital number, since it uses as much as digits as its factorization.

1390137811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1390137811 is about 37284.5519082636. The cubic root of 1390137811 is about 1116.0559111238.

The spelling of 1390137811 in words is "one billion, three hundred ninety million, one hundred thirty-seven thousand, eight hundred eleven".