1382951657 has 4 divisors (see below), whose sum is σ = 1383032196. Its totient is φ = 1382871120.

The previous prime is 1382951617. The next prime is 1382951693. The reversal of 1382951657 is 7561592831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7561592831 = 13 ⋅581660987.

It can be written as a sum of positive squares in 2 ways, for example, as 765130921 + 617820736 = 27661^2 + 24856^2 .

It is a cyclic number.

It is not a de Polignac number, because 1382951657 - 2⁶ = 1382951593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1382951617) 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, 3038 + ... + 52679.

It is an arithmetic number, because the mean of its divisors is an integer number (345758049).

Almost surely, 2^1382951657 is an apocalyptic number.

It is an amenable number.

1382951657 is a deficient number, since it is larger than the sum of its proper divisors (80539).

1382951657 is an equidigital number, since it uses as much as digits as its factorization.

1382951657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80538.

The product of its digits is 453600, while the sum is 47.

The square root of 1382951657 is about 37188.0579890911. The cubic root of 1382951657 is about 1114.1294812038.

The spelling of 1382951657 in words is "one billion, three hundred eighty-two million, nine hundred fifty-one thousand, six hundred fifty-seven".