690603531 has 4 divisors (see below), whose sum is σ = 920804712. Its totient is φ = 460402352.

The previous prime is 690603517. The next prime is 690603533. The reversal of 690603531 is 135306096.

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 690603531 - 2¹⁵ = 690570763 is a prime.

It is a super-2 number, since 2×690603531² = 953866474059335922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690603492 and 690603501.

It is not an unprimeable number, because it can be changed into a prime (690603533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115100586 + ... + 115100591.

It is an arithmetic number, because the mean of its divisors is an integer number (230201178).

Almost surely, 2^690603531 is an apocalyptic number.

690603531 is a deficient number, since it is larger than the sum of its proper divisors (230201181).

690603531 is a wasteful number, since it uses less digits than its factorization.

690603531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230201180.

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 690603531 is about 26279.3365783842. The cubic root of 690603531 is about 883.9131565521.

The spelling of 690603531 in words is "six hundred ninety million, six hundred three thousand, five hundred thirty-one".