745561939 has 2 divisors, whose sum is σ = 745561940. Its totient is φ = 745561938.

The previous prime is 745561903. The next prime is 745561963. The reversal of 745561939 is 939165547.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 745561939 - 2²³ = 737173331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 745561892 and 745561901.

It is not a weakly prime, because it can be changed into another prime (745561969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372780969 + 372780970.

It is an arithmetic number, because the mean of its divisors is an integer number (372780970).

Almost surely, 2^745561939 is an apocalyptic number.

745561939 is a deficient number, since it is larger than the sum of its proper divisors (1).

745561939 is an equidigital number, since it uses as much as digits as its factorization.

745561939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 49.

The square root of 745561939 is about 27304.9801135251. The cubic root of 745561939 is about 906.7646405234.

The spelling of 745561939 in words is "seven hundred forty-five million, five hundred sixty-one thousand, nine hundred thirty-nine".