16513397 has 4 divisors (see below), whose sum is σ = 16528896. Its totient is φ = 16497900.

The previous prime is 16513363. The next prime is 16513411. The reversal of 16513397 is 79331561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79331561 = 101 ⋅785461.

It is a cyclic number.

It is not a de Polignac number, because 16513397 - 2¹⁰ = 16512373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16513997) 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, 6023 + ... + 8324.

It is an arithmetic number, because the mean of its divisors is an integer number (4132224).

Almost surely, 2^16513397 is an apocalyptic number.

It is an amenable number.

16513397 is a deficient number, since it is larger than the sum of its proper divisors (15499).

16513397 is a wasteful number, since it uses less digits than its factorization.

16513397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15498.

The product of its digits is 17010, while the sum is 35.

The square root of 16513397 is about 4063.6679244249. The cubic root of 16513397 is about 254.6510516072.

The spelling of 16513397 in words is "sixteen million, five hundred thirteen thousand, three hundred ninety-seven".