694161497 has 4 divisors (see below), whose sum is σ = 694338996. Its totient is φ = 693984000.

The previous prime is 694161467. The next prime is 694161499. The reversal of 694161497 is 794161496.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 381967936 + 312193561 = 19544^2 + 17669^2 .

It is a cyclic number.

It is not a de Polignac number, because 694161497 - 2⁸ = 694161241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (694161499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82748 + ... + 90749.

It is an arithmetic number, because the mean of its divisors is an integer number (173584749).

Almost surely, 2^694161497 is an apocalyptic number.

It is an amenable number.

694161497 is a deficient number, since it is larger than the sum of its proper divisors (177499).

694161497 is a wasteful number, since it uses less digits than its factorization.

694161497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177498.

The product of its digits is 326592, while the sum is 47.

The square root of 694161497 is about 26346.9447374833. The cubic root of 694161497 is about 885.4285207034.

Subtracting 694161497 from its reverse (794161496), we obtain a palindrome (99999999).

The spelling of 694161497 in words is "six hundred ninety-four million, one hundred sixty-one thousand, four hundred ninety-seven".