690005601 has 8 divisors (see below), whose sum is σ = 1022230560. Its totient is φ = 460003716.

The previous prime is 690005581. The next prime is 690005621. The reversal of 690005601 is 106500096.

It is an interprime number because it is at equal distance from previous prime (690005581) and next prime (690005621).

It is not a de Polignac number, because 690005601 - 2¹⁷ = 689874529 is a prime.

It is a super-2 number, since 2×690005601² = 952215458822742402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 25555763 = 690005601 / (6 + 9 + 0 + 0 + 0 + 5 + 6 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (690005621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12777855 + ... + 12777908.

It is an arithmetic number, because the mean of its divisors is an integer number (127778820).

Almost surely, 2^690005601 is an apocalyptic number.

It is an amenable number.

690005601 is a deficient number, since it is larger than the sum of its proper divisors (332224959).

690005601 is a wasteful number, since it uses less digits than its factorization.

690005601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25555772 (or 25555766 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 690005601 is about 26267.9576861240. The cubic root of 690005601 is about 883.6579832266.

Adding to 690005601 its reverse (106500096), we get a palindrome (796505697).

The spelling of 690005601 in words is "six hundred ninety million, five thousand, six hundred one".