9139402 has 4 divisors (see below), whose sum is σ = 13709106. Its totient is φ = 4569700.

The previous prime is 9139397. The next prime is 9139439. The reversal of 9139402 is 2049319.

It is a happy number.

9139402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6446521 + 2692881 = 2539^2 + 1641^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2284849 + ... + 2284852.

Almost surely, 2^9139402 is an apocalyptic number.

9139402 is a deficient number, since it is larger than the sum of its proper divisors (4569704).

9139402 is a wasteful number, since it uses less digits than its factorization.

9139402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569703.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 9139402 is about 3023.1443895388. The cubic root of 9139402 is about 209.0768396445.

It can be divided in two parts, 91 and 39402, that added together give a palindrome (39493).

The spelling of 9139402 in words is "nine million, one hundred thirty-nine thousand, four hundred two".