1209780967 has 2 divisors, whose sum is σ = 1209780968. Its totient is φ = 1209780966.

The previous prime is 1209780959. The next prime is 1209780989. The reversal of 1209780967 is 7690879021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1209780967 - 2³ = 1209780959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1209780967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209780917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604890483 + 604890484.

It is an arithmetic number, because the mean of its divisors is an integer number (604890484).

Almost surely, 2^1209780967 is an apocalyptic number.

1209780967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209780967 is an equidigital number, since it uses as much as digits as its factorization.

1209780967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 1209780967 is about 34781.9057413478. The cubic root of 1209780967 is about 1065.5379347998.

The spelling of 1209780967 in words is "one billion, two hundred nine million, seven hundred eighty thousand, nine hundred sixty-seven".