1393989101 has 2 divisors, whose sum is σ = 1393989102. Its totient is φ = 1393989100.

The previous prime is 1393989089. The next prime is 1393989127. The reversal of 1393989101 is 1019893931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1027266601 + 366722500 = 32051^2 + 19150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393989101 - 2¹⁰ = 1393988077 is a prime.

It is a super-2 number, since 2×1393989101² = 3886411227413576402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1393989301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696994550 + 696994551.

It is an arithmetic number, because the mean of its divisors is an integer number (696994551).

Almost surely, 2^1393989101 is an apocalyptic number.

It is an amenable number.

1393989101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393989101 is an equidigital number, since it uses as much as digits as its factorization.

1393989101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 1393989101 is about 37336.1634477888. The cubic root of 1393989101 is about 1117.0856152018.

The spelling of 1393989101 in words is "one billion, three hundred ninety-three million, nine hundred eighty-nine thousand, one hundred one".