1381747237 has 4 divisors (see below), whose sum is σ = 1488035500. Its totient is φ = 1275458976.

The previous prime is 1381747223. The next prime is 1381747247. The reversal of 1381747237 is 7327471831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7327471831 = 52567 ⋅139393.

It can be written as a sum of positive squares in 2 ways, for example, as 426257316 + 955489921 = 20646^2 + 30911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381747237 - 2¹⁵ = 1381714469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1381747193 and 1381747202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381747207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53144112 + ... + 53144137.

It is an arithmetic number, because the mean of its divisors is an integer number (372008875).

Almost surely, 2^1381747237 is an apocalyptic number.

It is an amenable number.

1381747237 is a deficient number, since it is larger than the sum of its proper divisors (106288263).

1381747237 is a wasteful number, since it uses less digits than its factorization.

1381747237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106288262.

The product of its digits is 197568, while the sum is 43.

The square root of 1381747237 is about 37171.8608224017. The cubic root of 1381747237 is about 1113.8059534888.

The spelling of 1381747237 in words is "one billion, three hundred eighty-one million, seven hundred forty-seven thousand, two hundred thirty-seven".