1078395949 has 2 divisors, whose sum is σ = 1078395950. Its totient is φ = 1078395948.

The previous prime is 1078395947. The next prime is 1078396013. The reversal of 1078395949 is 9495938701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673662025 + 404733924 = 25955^2 + 20118^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078395949 - 2¹ = 1078395947 is a prime.

It is a super-2 number, since 2×1078395949² = 2325875645639221202, which contains 22 as substring.

Together with 1078395947, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1078395949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078395947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539197974 + 539197975.

It is an arithmetic number, because the mean of its divisors is an integer number (539197975).

Almost surely, 2^1078395949 is an apocalyptic number.

It is an amenable number.

1078395949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078395949 is an equidigital number, since it uses as much as digits as its factorization.

1078395949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 1078395949 is about 32838.9395230723. The cubic root of 1078395949 is about 1025.4773739891.

The spelling of 1078395949 in words is "one billion, seventy-eight million, three hundred ninety-five thousand, nine hundred forty-nine".