1387546973 has 2 divisors, whose sum is σ = 1387546974. Its totient is φ = 1387546972.

The previous prime is 1387546957. The next prime is 1387546997. The reversal of 1387546973 is 3796457831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 894129604 + 493417369 = 29902^2 + 22213^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387546973 - 2⁴ = 1387546957 is a prime.

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 (1387546903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693773486 + 693773487.

It is an arithmetic number, because the mean of its divisors is an integer number (693773487).

Almost surely, 2^1387546973 is an apocalyptic number.

It is an amenable number.

1387546973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387546973 is an equidigital number, since it uses as much as digits as its factorization.

1387546973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 53.

The square root of 1387546973 is about 37249.7915833096. The cubic root of 1387546973 is about 1115.3621385978.

The spelling of 1387546973 in words is "one billion, three hundred eighty-seven million, five hundred forty-six thousand, nine hundred seventy-three".