1320154949 has 2 divisors, whose sum is σ = 1320154950. Its totient is φ = 1320154948.

The previous prime is 1320154841. The next prime is 1320154973. The reversal of 1320154949 is 9494510231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1096801924 + 223353025 = 33118^2 + 14945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320154949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320154999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660077474 + 660077475.

It is an arithmetic number, because the mean of its divisors is an integer number (660077475).

Almost surely, 2^1320154949 is an apocalyptic number.

It is an amenable number.

1320154949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320154949 is an equidigital number, since it uses as much as digits as its factorization.

1320154949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1320154949 is about 36333.9366020254. The cubic root of 1320154949 is about 1097.0042312966.

The spelling of 1320154949 in words is "one billion, three hundred twenty million, one hundred fifty-four thousand, nine hundred forty-nine".