690622477 has 2 divisors, whose sum is σ = 690622478. Its totient is φ = 690622476.

The previous prime is 690622463. The next prime is 690622481. The reversal of 690622477 is 774226096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 495908361 + 194714116 = 22269^2 + 13954^2 .

It is a cyclic number.

It is not a de Polignac number, because 690622477 - 2⁷ = 690622349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690622417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345311238 + 345311239.

It is an arithmetic number, because the mean of its divisors is an integer number (345311239).

Almost surely, 2^690622477 is an apocalyptic number.

It is an amenable number.

690622477 is a deficient number, since it is larger than the sum of its proper divisors (1).

690622477 is an equidigital number, since it uses as much as digits as its factorization.

690622477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 690622477 is about 26279.6970492432. The cubic root of 690622477 is about 883.9212395620.

The spelling of 690622477 in words is "six hundred ninety million, six hundred twenty-two thousand, four hundred seventy-seven".