690446479 has 2 divisors, whose sum is σ = 690446480. Its totient is φ = 690446478.

The previous prime is 690446461. The next prime is 690446503. The reversal of 690446479 is 974644096.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690446479 - 2⁵ = 690446447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690444479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345223239 + 345223240.

It is an arithmetic number, because the mean of its divisors is an integer number (345223240).

Almost surely, 2^690446479 is an apocalyptic number.

690446479 is a deficient number, since it is larger than the sum of its proper divisors (1).

690446479 is an equidigital number, since it uses as much as digits as its factorization.

690446479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 690446479 is about 26276.3482812966. The cubic root of 690446479 is about 883.8461471189.

The spelling of 690446479 in words is "six hundred ninety million, four hundred forty-six thousand, four hundred seventy-nine".