690461487 has 12 divisors (see below), whose sum is σ = 997568520. Its totient is φ = 460199088.

The previous prime is 690461461. The next prime is 690461489. The reversal of 690461487 is 784164096.

It is not a de Polignac number, because 690461487 - 2¹¹ = 690459439 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690461489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55353 + ... + 66669.

It is an arithmetic number, because the mean of its divisors is an integer number (83130710).

Almost surely, 2^690461487 is an apocalyptic number.

690461487 is a deficient number, since it is larger than the sum of its proper divisors (307107033).

690461487 is a wasteful number, since it uses less digits than its factorization.

690461487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18102 (or 18099 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 690461487 is about 26276.6338597622. The cubic root of 690461487 is about 883.8525510268.

The spelling of 690461487 in words is "six hundred ninety million, four hundred sixty-one thousand, four hundred eighty-seven".