13957738 has 4 divisors (see below), whose sum is σ = 20936610. Its totient is φ = 6978868.

The previous prime is 13957733. The next prime is 13957739. The reversal of 13957738 is 83775931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83775931 = 127 ⋅659653.

It can be written as a sum of positive squares in only one way, i.e., 11607649 + 2350089 = 3407^2 + 1533^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13957694 and 13957703.

It is not an unprimeable number, because it can be changed into a prime (13957733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489433 + ... + 3489436.

Almost surely, 2^13957738 is an apocalyptic number.

13957738 is a deficient number, since it is larger than the sum of its proper divisors (6978872).

13957738 is an equidigital number, since it uses as much as digits as its factorization.

13957738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6978871.

The product of its digits is 158760, while the sum is 43.

The square root of 13957738 is about 3736.0056209808. The cubic root of 13957738 is about 240.7714642808.

The spelling of 13957738 in words is "thirteen million, nine hundred fifty-seven thousand, seven hundred thirty-eight".