690387417 has 6 divisors (see below), whose sum is σ = 997226282. Its totient is φ = 460258272.

The previous prime is 690387409. The next prime is 690387421. The reversal of 690387417 is 714783096.

It can be written as a sum of positive squares in only one way, i.e., 687016521 + 3370896 = 26211^2 + 1836^2 .

It is not a de Polignac number, because 690387417 - 2³ = 690387409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690387517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38354848 + ... + 38354865.

Almost surely, 2^690387417 is an apocalyptic number.

It is an amenable number.

690387417 is a deficient number, since it is larger than the sum of its proper divisors (306838865).

690387417 is a wasteful number, since it uses less digits than its factorization.

690387417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76709719 (or 76709716 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 690387417 is about 26275.2243948553. The cubic root of 690387417 is about 883.8209444850.

The spelling of 690387417 in words is "six hundred ninety million, three hundred eighty-seven thousand, four hundred seventeen".