3138698 has 4 divisors (see below), whose sum is σ = 4708050. Its totient is φ = 1569348.

The previous prime is 3138691. The next prime is 3138767. The reversal of 3138698 is 8968313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8968313 = 103 ⋅87071.

It can be written as a sum of positive squares in only one way, i.e., 2550409 + 588289 = 1597^2 + 767^2 .

It is not an unprimeable number, because it can be changed into a prime (3138691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 784673 + ... + 784676.

Almost surely, 2^3138698 is an apocalyptic number.

3138698 is a deficient number, since it is larger than the sum of its proper divisors (1569352).

3138698 is a wasteful number, since it uses less digits than its factorization.

3138698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569351.

The product of its digits is 31104, while the sum is 38.

The square root of 3138698 is about 1771.6370960216. The cubic root of 3138698 is about 146.4141925883.

The spelling of 3138698 in words is "three million, one hundred thirty-eight thousand, six hundred ninety-eight".