690328754 has 4 divisors (see below), whose sum is σ = 1035493134. Its totient is φ = 345164376.

The previous prime is 690328753. The next prime is 690328757. The reversal of 690328754 is 457823096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 677404729 + 12924025 = 26027^2 + 3595^2 .

It is not an unprimeable number, because it can be changed into a prime (690328753) 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 as a sum of consecutive naturals, namely, 172582187 + ... + 172582190.

Almost surely, 2^690328754 is an apocalyptic number.

690328754 is a deficient number, since it is larger than the sum of its proper divisors (345164380).

690328754 is a wasteful number, since it uses less digits than its factorization.

690328754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345164379.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 690328754 is about 26274.1080533669. The cubic root of 690328754 is about 883.7959106873.

The spelling of 690328754 in words is "six hundred ninety million, three hundred twenty-eight thousand, seven hundred fifty-four".