1197951949 has 2 divisors, whose sum is σ = 1197951950. Its totient is φ = 1197951948.

The previous prime is 1197951913. The next prime is 1197951983. The reversal of 1197951949 is 9491597911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1191285225 + 6666724 = 34515^2 + 2582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1197951949 - 2⁹ = 1197951437 is a prime.

It is a super-2 number, since 2×1197951949² = 2870177744225797202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1197951949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1197951149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598975974 + 598975975.

It is an arithmetic number, because the mean of its divisors is an integer number (598975975).

Almost surely, 2^1197951949 is an apocalyptic number.

It is an amenable number.

1197951949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197951949 is an equidigital number, since it uses as much as digits as its factorization.

1197951949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 55.

The square root of 1197951949 is about 34611.4424576613. The cubic root of 1197951949 is about 1062.0536752189.

The spelling of 1197951949 in words is "one billion, one hundred ninety-seven million, nine hundred fifty-one thousand, nine hundred forty-nine".