1975426069 has 2 divisors, whose sum is σ = 1975426070. Its totient is φ = 1975426068.

The previous prime is 1975426039. The next prime is 1975426081. The reversal of 1975426069 is 9606245791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1040901169 + 934524900 = 32263^2 + 30570^2 .

It is an emirp because it is prime and its reverse (9606245791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1975426069 is a prime.

It is a super-2 number, since 2×1975426069² = 7804616308169585522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1975426039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987713034 + 987713035.

It is an arithmetic number, because the mean of its divisors is an integer number (987713035).

Almost surely, 2^1975426069 is an apocalyptic number.

It is an amenable number.

1975426069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975426069 is an equidigital number, since it uses as much as digits as its factorization.

1975426069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 1975426069 is about 44445.7654788395. The cubic root of 1975426069 is about 1254.7395678708.

The spelling of 1975426069 in words is "one billion, nine hundred seventy-five million, four hundred twenty-six thousand, sixty-nine".