1969501979 has 2 divisors, whose sum is σ = 1969501980. Its totient is φ = 1969501978.

The previous prime is 1969501949. The next prime is 1969502009. The reversal of 1969501979 is 9791059691.

It is a balanced prime because it is at equal distance from previous prime (1969501949) and next prime (1969502009).

It is a cyclic number.

It is not a de Polignac number, because 1969501979 - 2¹² = 1969497883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1969501939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984750989 + 984750990.

It is an arithmetic number, because the mean of its divisors is an integer number (984750990).

Almost surely, 2^1969501979 is an apocalyptic number.

1969501979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969501979 is an equidigital number, since it uses as much as digits as its factorization.

1969501979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1377810, while the sum is 56.

The square root of 1969501979 is about 44379.0714075903. The cubic root of 1969501979 is about 1253.4840356941.

The spelling of 1969501979 in words is "one billion, nine hundred sixty-nine million, five hundred one thousand, nine hundred seventy-nine".