690332401 has 4 divisors (see below), whose sum is σ = 753089904. Its totient is φ = 627574900.

The previous prime is 690332399. The next prime is 690332407. The reversal of 690332401 is 104233096.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 690332401 - 2¹ = 690332399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690332401.

It is not an unprimeable number, because it can be changed into a prime (690332407) 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, 31378735 + ... + 31378756.

It is an arithmetic number, because the mean of its divisors is an integer number (188272476).

Almost surely, 2^690332401 is an apocalyptic number.

It is an amenable number.

690332401 is a deficient number, since it is larger than the sum of its proper divisors (62757503).

690332401 is a wasteful number, since it uses less digits than its factorization.

690332401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62757502.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 690332401 is about 26274.1774562021. The cubic root of 690332401 is about 883.7974670463.

Adding to 690332401 its reverse (104233096), we get a palindrome (794565497).

It can be divided in two parts, 6903 and 32401, that added together give a cube (39304 = 34³).

The spelling of 690332401 in words is "six hundred ninety million, three hundred thirty-two thousand, four hundred one".