690407677 has 4 divisors (see below), whose sum is σ = 690766780. Its totient is φ = 690048576.

The previous prime is 690407671. The next prime is 690407701. The reversal of 690407677 is 776704096.

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 256352121 + 434055556 = 16011^2 + 20834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690407677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690407671) 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, 176652 + ... + 180517.

It is an arithmetic number, because the mean of its divisors is an integer number (172691695).

Almost surely, 2^690407677 is an apocalyptic number.

It is an amenable number.

690407677 is a deficient number, since it is larger than the sum of its proper divisors (359103).

690407677 is a wasteful number, since it uses less digits than its factorization.

690407677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359102.

The product of its (nonzero) digits is 444528, while the sum is 46.

The square root of 690407677 is about 26275.6099263176. The cubic root of 690407677 is about 883.8295898903.

The spelling of 690407677 in words is "six hundred ninety million, four hundred seven thousand, six hundred seventy-seven".