8149351997 has 4 divisors (see below), whose sum is σ = 8578265280. Its totient is φ = 7720438716.

The previous prime is 8149351979. The next prime is 8149352011. The reversal of 8149351997 is 7991539418.

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 8149351997 - 2¹⁶ = 8149286461 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 (8149351937) 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, 214456613 + ... + 214456650.

It is an arithmetic number, because the mean of its divisors is an integer number (2144566320).

Almost surely, 2^8149351997 is an apocalyptic number.

It is an amenable number.

8149351997 is a deficient number, since it is larger than the sum of its proper divisors (428913283).

8149351997 is a wasteful number, since it uses less digits than its factorization.

8149351997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428913282.

The product of its digits is 2449440, while the sum is 56.

The square root of 8149351997 is about 90273.7613983155. The cubic root of 8149351997 is about 2012.3693417328.

The spelling of 8149351997 in words is "eight billion, one hundred forty-nine million, three hundred fifty-one thousand, nine hundred ninety-seven".