3129998 has 4 divisors (see below), whose sum is σ = 4695000. Its totient is φ = 1564998.

The previous prime is 3129991. The next prime is 3130007. The reversal of 3129998 is 8999213.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3129991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782498 + ... + 782501.

It is an arithmetic number, because the mean of its divisors is an integer number (1173750).

Almost surely, 2^3129998 is an apocalyptic number.

3129998 is a deficient number, since it is larger than the sum of its proper divisors (1565002).

3129998 is a wasteful number, since it uses less digits than its factorization.

3129998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565001.

The product of its digits is 34992, while the sum is 41.

The square root of 3129998 is about 1769.1800360619. The cubic root of 3129998 is about 146.2787880116.

The spelling of 3129998 in words is "three million, one hundred twenty-nine thousand, nine hundred ninety-eight".