690751641 has 16 divisors (see below), whose sum is σ = 973905408. Its totient is φ = 434774400.

The previous prime is 690751637. The next prime is 690751657. The reversal of 690751641 is 146157096.

It is not a de Polignac number, because 690751641 - 2² = 690751637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 690751641.

It is not an unprimeable number, because it can be changed into a prime (690751741) 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 15 ways as a sum of consecutive naturals, for example, 86766 + ... + 94391.

It is an arithmetic number, because the mean of its divisors is an integer number (60869088).

Almost surely, 2^690751641 is an apocalyptic number.

It is an amenable number.

690751641 is a deficient number, since it is larger than the sum of its proper divisors (283153767).

690751641 is a wasteful number, since it uses less digits than its factorization.

690751641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181232.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 690751641 is about 26282.1544208233. The cubic root of 690751641 is about 883.9763413916.

The spelling of 690751641 in words is "six hundred ninety million, seven hundred fifty-one thousand, six hundred forty-one".