39513998 has 4 divisors (see below), whose sum is σ = 59271000. Its totient is φ = 19756998.

The previous prime is 39513997. The next prime is 39514003. The reversal of 39513998 is 89931593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89931593 = 773 ⋅116341.

It is a super-2 number, since 2×39513998² = 3122712075888008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39513997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9878498 + ... + 9878501.

It is an arithmetic number, because the mean of its divisors is an integer number (14817750).

Almost surely, 2^39513998 is an apocalyptic number.

39513998 is a deficient number, since it is larger than the sum of its proper divisors (19757002).

39513998 is a wasteful number, since it uses less digits than its factorization.

39513998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19757001.

The product of its digits is 262440, while the sum is 47.

The square root of 39513998 is about 6286.0160674309. The cubic root of 39513998 is about 340.6044553218.

The spelling of 39513998 in words is "thirty-nine million, five hundred thirteen thousand, nine hundred ninety-eight".