785745397 has 2 divisors, whose sum is σ = 785745398. Its totient is φ = 785745396.

The previous prime is 785745349. The next prime is 785745403. The reversal of 785745397 is 793547587.

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., 754820676 + 30924721 = 27474^2 + 5561^2 .

It is a cyclic number.

It is not a de Polignac number, because 785745397 - 2⁷ = 785745269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (785745307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392872698 + 392872699.

It is an arithmetic number, because the mean of its divisors is an integer number (392872699).

Almost surely, 2^785745397 is an apocalyptic number.

It is an amenable number.

785745397 is a deficient number, since it is larger than the sum of its proper divisors (1).

785745397 is an equidigital number, since it uses as much as digits as its factorization.

785745397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7408800, while the sum is 55.

The square root of 785745397 is about 28031.1504758545. The cubic root of 785745397 is about 922.7710234979.

It can be divided in two parts, 78 and 5745397, that added together give a palindrome (5745475).

The spelling of 785745397 in words is "seven hundred eighty-five million, seven hundred forty-five thousand, three hundred ninety-seven".