1378960157 has 4 divisors (see below), whose sum is σ = 1380772956. Its totient is φ = 1377147360.

The previous prime is 1378960153. The next prime is 1378960159. The reversal of 1378960157 is 7510698731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7510698731 = 13331 ⋅563401.

It can be written as a sum of positive squares in 2 ways, for example, as 506880196 + 872079961 = 22514^2 + 29531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378960157 - 2² = 1378960153 is a prime.

It is a super-2 number, since 2×1378960157² = 3803062229186929298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378960153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905258 + ... + 906779.

It is an arithmetic number, because the mean of its divisors is an integer number (345193239).

Almost surely, 2^1378960157 is an apocalyptic number.

It is an amenable number.

1378960157 is a deficient number, since it is larger than the sum of its proper divisors (1812799).

1378960157 is an equidigital number, since it uses as much as digits as its factorization.

1378960157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812798.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 1378960157 is about 37134.3527882202. The cubic root of 1378960157 is about 1113.0565747966.

The spelling of 1378960157 in words is "one billion, three hundred seventy-eight million, nine hundred sixty thousand, one hundred fifty-seven".