690143626 has 4 divisors (see below), whose sum is σ = 1035215442. Its totient is φ = 345071812.

The previous prime is 690143621. The next prime is 690143639. The reversal of 690143626 is 626341096.

It is a happy number.

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., 503957601 + 186186025 = 22449^2 + 13645^2 .

It is not an unprimeable number, because it can be changed into a prime (690143621) 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 as a sum of consecutive naturals, namely, 172535905 + ... + 172535908.

Almost surely, 2^690143626 is an apocalyptic number.

690143626 is a deficient number, since it is larger than the sum of its proper divisors (345071816).

690143626 is a wasteful number, since it uses less digits than its factorization.

690143626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345071815.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 690143626 is about 26270.5848050629. The cubic root of 690143626 is about 883.7169000245.

The spelling of 690143626 in words is "six hundred ninety million, one hundred forty-three thousand, six hundred twenty-six".