1375662973 has 2 divisors, whose sum is σ = 1375662974. Its totient is φ = 1375662972.

The previous prime is 1375662929. The next prime is 1375662991. The reversal of 1375662973 is 3792665731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 762753924 + 612909049 = 27618^2 + 24757^2 .

It is an emirp because it is prime and its reverse (3792665731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1375662973 - 2¹⁷ = 1375531901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375662173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687831486 + 687831487.

It is an arithmetic number, because the mean of its divisors is an integer number (687831487).

Almost surely, 2^1375662973 is an apocalyptic number.

It is an amenable number.

1375662973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375662973 is an equidigital number, since it uses as much as digits as its factorization.

1375662973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 49.

The square root of 1375662973 is about 37089.9308842710. The cubic root of 1375662973 is about 1112.1687364172.

It can be divided in two parts, 13756 and 62973, that added together give a square (76729 = 277²).

The spelling of 1375662973 in words is "one billion, three hundred seventy-five million, six hundred sixty-two thousand, nine hundred seventy-three".