690968743 has 4 divisors (see below), whose sum is σ = 691070328. Its totient is φ = 690867160.

The previous prime is 690968741. The next prime is 690968779. The reversal of 690968743 is 347869096.

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

It is a cyclic number.

It is not a de Polignac number, because 690968743 - 2¹ = 690968741 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 (690968741) 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, 39796 + ... + 54457.

It is an arithmetic number, because the mean of its divisors is an integer number (172767582).

Almost surely, 2^690968743 is an apocalyptic number.

690968743 is a deficient number, since it is larger than the sum of its proper divisors (101585).

690968743 is an equidigital number, since it uses as much as digits as its factorization.

690968743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101584.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 690968743 is about 26286.2843133068. The cubic root of 690968743 is about 884.0689424163.

The spelling of 690968743 in words is "six hundred ninety million, nine hundred sixty-eight thousand, seven hundred forty-three".