1197672649 has 4 divisors (see below), whose sum is σ = 1208271636. Its totient is φ = 1187073664.

The previous prime is 1197672643. The next prime is 1197672703. The reversal of 1197672649 is 9462767911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 409860025 + 787812624 = 20245^2 + 28068^2 .

It is a cyclic number.

It is not a de Polignac number, because 1197672649 - 2⁵ = 1197672617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1197672596 and 1197672605.

It is not an unprimeable number, because it can be changed into a prime (1197672643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5299324 + ... + 5299549.

It is an arithmetic number, because the mean of its divisors is an integer number (302067909).

Almost surely, 2^1197672649 is an apocalyptic number.

It is an amenable number.

1197672649 is a deficient number, since it is larger than the sum of its proper divisors (10598987).

1197672649 is a wasteful number, since it uses less digits than its factorization.

1197672649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10598986.

The product of its digits is 1143072, while the sum is 52.

The square root of 1197672649 is about 34607.4074296241. The cubic root of 1197672649 is about 1061.9711302700.

The spelling of 1197672649 in words is "one billion, one hundred ninety-seven million, six hundred seventy-two thousand, six hundred forty-nine".