1197920739 has 16 divisors (see below), whose sum is σ = 1648150560. Its totient is φ = 773437440.

The previous prime is 1197920651. The next prime is 1197920743. The reversal of 1197920739 is 9370297911.

It is a happy number.

It is not a de Polignac number, because 1197920739 - 2¹¹ = 1197918691 is a prime.

It is a super-2 number, since 2×1197920739² = 2870028193852612242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1197920239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18694 + ... + 52395.

It is an arithmetic number, because the mean of its divisors is an integer number (103009410).

Almost surely, 2^1197920739 is an apocalyptic number.

1197920739 is a deficient number, since it is larger than the sum of its proper divisors (450229821).

1197920739 is a wasteful number, since it uses less digits than its factorization.

1197920739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71270.

The product of its (nonzero) digits is 214326, while the sum is 48.

The square root of 1197920739 is about 34610.9915922673. The cubic root of 1197920739 is about 1062.0444519823.

The spelling of 1197920739 in words is "one billion, one hundred ninety-seven million, nine hundred twenty thousand, seven hundred thirty-nine".