163499997 has 8 divisors (see below), whose sum is σ = 229473760. Its totient is φ = 103263120.

The previous prime is 163499977. The next prime is 163500017. The reversal of 163499997 is 799994361.

It is an interprime number because it is at equal distance from previous prime (163499977) and next prime (163500017).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163499997 - 2⁶ = 163499933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 2868421 = 163499997 / (1 + 6 + 3 + 4 + 9 + 9 + 9 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163499977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434154 + ... + 1434267.

It is an arithmetic number, because the mean of its divisors is an integer number (28684220).

Almost surely, 2^163499997 is an apocalyptic number.

It is an amenable number.

163499997 is a deficient number, since it is larger than the sum of its proper divisors (65973763).

163499997 is a wasteful number, since it uses less digits than its factorization.

163499997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868443.

The product of its digits is 3306744, while the sum is 57.

The square root of 163499997 is about 12786.7117352351. The cubic root of 163499997 is about 546.8135271615.

The spelling of 163499997 in words is "one hundred sixty-three million, four hundred ninety-nine thousand, nine hundred ninety-seven".