1945969 has 2 divisors, whose sum is σ = 1945970. Its totient is φ = 1945968.

The previous prime is 1945943. The next prime is 1945981. The reversal of 1945969 is 9695491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1600225 + 345744 = 1265^2 + 588^2 .

It is a cyclic number.

It is not a de Polignac number, because 1945969 - 2⁹ = 1945457 is a prime.

It is a super-2 number, since 2×1945969² = 7573590697922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1945919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972984 + 972985.

It is an arithmetic number, because the mean of its divisors is an integer number (972985).

2^1945969 is an apocalyptic number.

It is an amenable number.

1945969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945969 is an equidigital number, since it uses as much as digits as its factorization.

1945969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 43.

The square root of 1945969 is about 1394.9799281710. The cubic root of 1945969 is about 124.8471518424.

The spelling of 1945969 in words is "one million, nine hundred forty-five thousand, nine hundred sixty-nine".