690061723 has 4 divisors (see below), whose sum is σ = 743143408. Its totient is φ = 636980040.

The previous prime is 690061717. The next prime is 690061759. The reversal of 690061723 is 327160096.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690061723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690061123) 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, 26540823 + ... + 26540848.

It is an arithmetic number, because the mean of its divisors is an integer number (185785852).

Almost surely, 2^690061723 is an apocalyptic number.

690061723 is a deficient number, since it is larger than the sum of its proper divisors (53081685).

690061723 is a wasteful number, since it uses less digits than its factorization.

690061723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53081684.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 690061723 is about 26269.0259240802. The cubic root of 690061723 is about 883.6819401862.

The spelling of 690061723 in words is "six hundred ninety million, sixty-one thousand, seven hundred twenty-three".