38999213 has 4 divisors (see below), whose sum is σ = 42544608. Its totient is φ = 35453820.

The previous prime is 38999197. The next prime is 38999239. The reversal of 38999213 is 31299983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38999213 - 2⁴ = 38999197 is a prime.

It is a super-2 number, since 2×38999213² = 3041877229238738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38999273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1772681 + ... + 1772702.

It is an arithmetic number, because the mean of its divisors is an integer number (10636152).

Almost surely, 2^38999213 is an apocalyptic number.

It is an amenable number.

38999213 is a deficient number, since it is larger than the sum of its proper divisors (3545395).

38999213 is a wasteful number, since it uses less digits than its factorization.

38999213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3545394.

The product of its digits is 104976, while the sum is 44.

The square root of 38999213 is about 6244.9349876520. The cubic root of 38999213 is about 339.1188631891.

The spelling of 38999213 in words is "thirty-eight million, nine hundred ninety-nine thousand, two hundred thirteen".