694997777 has 4 divisors (see below), whose sum is σ = 711160560. Its totient is φ = 678834996.

The previous prime is 694997717. The next prime is 694997783. The reversal of 694997777 is 777799496.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 694997777 - 2¹⁴ = 694981393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (694997717) 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, 8081327 + ... + 8081412.

It is an arithmetic number, because the mean of its divisors is an integer number (177790140).

Almost surely, 2^694997777 is an apocalyptic number.

It is an amenable number.

694997777 is a deficient number, since it is larger than the sum of its proper divisors (16162783).

694997777 is a wasteful number, since it uses less digits than its factorization.

694997777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16162782.

The product of its digits is 42007896, while the sum is 65.

The square root of 694997777 is about 26362.8104912963. The cubic root of 694997777 is about 885.7839466431.

The spelling of 694997777 in words is "six hundred ninety-four million, nine hundred ninety-seven thousand, seven hundred seventy-seven".