1387711901 has 2 divisors, whose sum is σ = 1387711902. Its totient is φ = 1387711900.

The previous prime is 1387711891. The next prime is 1387711967. The reversal of 1387711901 is 1091177831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 756195001 + 631516900 = 27499^2 + 25130^2 .

It is an emirp because it is prime and its reverse (1091177831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387711901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387711991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693855950 + 693855951.

It is an arithmetic number, because the mean of its divisors is an integer number (693855951).

Almost surely, 2^1387711901 is an apocalyptic number.

It is an amenable number.

1387711901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387711901 is an equidigital number, since it uses as much as digits as its factorization.

1387711901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 38.

The square root of 1387711901 is about 37252.0053285726. The cubic root of 1387711901 is about 1115.4063286114.

The spelling of 1387711901 in words is "one billion, three hundred eighty-seven million, seven hundred eleven thousand, nine hundred one".