1953719969 has 2 divisors, whose sum is σ = 1953719970. Its totient is φ = 1953719968.

The previous prime is 1953719953. The next prime is 1953720001. The reversal of 1953719969 is 9699173591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1066871569 + 886848400 = 32663^2 + 29780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1953719969 - 2⁴ = 1953719953 is a prime.

It is a super-2 number, since 2×1953719969² = 7634043434538721922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1953719939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976859984 + 976859985.

It is an arithmetic number, because the mean of its divisors is an integer number (976859985).

Almost surely, 2^1953719969 is an apocalyptic number.

It is an amenable number.

1953719969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953719969 is an equidigital number, since it uses as much as digits as its factorization.

1953719969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4133430, while the sum is 59.

The square root of 1953719969 is about 44200.9046174397. The cubic root of 1953719969 is about 1250.1269138339.

The spelling of 1953719969 in words is "one billion, nine hundred fifty-three million, seven hundred nineteen thousand, nine hundred sixty-nine".