690968141 has 4 divisors (see below), whose sum is σ = 700433532. Its totient is φ = 681502752.

The previous prime is 690968137. The next prime is 690968177. The reversal of 690968141 is 141869096.

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 141253225 + 549714916 = 11885^2 + 23446^2 .

It is a cyclic number.

It is not a de Polignac number, because 690968141 - 2² = 690968137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690968092 and 690968101.

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, 4732586 + ... + 4732731.

It is an arithmetic number, because the mean of its divisors is an integer number (175108383).

Almost surely, 2^690968141 is an apocalyptic number.

It is an amenable number.

690968141 is a deficient number, since it is larger than the sum of its proper divisors (9465391).

690968141 is an equidigital number, since it uses as much as digits as its factorization.

690968141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9465390.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 690968141 is about 26286.2728624657. The cubic root of 690968141 is about 884.0686856706.

The spelling of 690968141 in words is "six hundred ninety million, nine hundred sixty-eight thousand, one hundred forty-one".