690220417 has 4 divisors (see below), whose sum is σ = 730821636. Its totient is φ = 649619200.

The previous prime is 690220411. The next prime is 690220423. The reversal of 690220417 is 714022096.

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

It is an interprime number because it is at equal distance from previous prime (690220411) and next prime (690220423).

It can be written as a sum of positive squares in 2 ways, for example, as 428945521 + 261274896 = 20711^2 + 16164^2 .

It is a cyclic number.

It is not a de Polignac number, because 690220417 - 2¹¹ = 690218369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690220411) 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, 20300584 + ... + 20300617.

It is an arithmetic number, because the mean of its divisors is an integer number (182705409).

Almost surely, 2^690220417 is an apocalyptic number.

It is an amenable number.

690220417 is a deficient number, since it is larger than the sum of its proper divisors (40601219).

690220417 is a wasteful number, since it uses less digits than its factorization.

690220417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40601218.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 690220417 is about 26272.0463040091. The cubic root of 690220417 is about 883.7496753218.

The spelling of 690220417 in words is "six hundred ninety million, two hundred twenty thousand, four hundred seventeen".