1197969739 has 2 divisors, whose sum is σ = 1197969740. Its totient is φ = 1197969738.

The previous prime is 1197969713. The next prime is 1197969749. The reversal of 1197969739 is 9379697911.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1197969739 - 2¹⁹ = 1197445451 is a prime.

It is not a weakly prime, because it can be changed into another prime (1197969749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598984869 + 598984870.

It is an arithmetic number, because the mean of its divisors is an integer number (598984870).

Almost surely, 2^1197969739 is an apocalyptic number.

1197969739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197969739 is an equidigital number, since it uses as much as digits as its factorization.

1197969739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5786802, while the sum is 61.

The square root of 1197969739 is about 34611.6994526417. The cubic root of 1197969739 is about 1062.0589324808.

It can be divided in two parts, 11979 and 69739, that added together give a palindrome (81718).

The spelling of 1197969739 in words is "one billion, one hundred ninety-seven million, nine hundred sixty-nine thousand, seven hundred thirty-nine".