690573407 has 2 divisors, whose sum is σ = 690573408. Its totient is φ = 690573406.

The previous prime is 690573353. The next prime is 690573409. The reversal of 690573407 is 704375096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690573407 - 2¹⁰ = 690572383 is a prime.

Together with 690573409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690573409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345286703 + 345286704.

It is an arithmetic number, because the mean of its divisors is an integer number (345286704).

Almost surely, 2^690573407 is an apocalyptic number.

690573407 is a deficient number, since it is larger than the sum of its proper divisors (1).

690573407 is an equidigital number, since it uses as much as digits as its factorization.

690573407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 690573407 is about 26278.7634222008. The cubic root of 690573407 is about 883.9003043217.

The spelling of 690573407 in words is "six hundred ninety million, five hundred seventy-three thousand, four hundred seven".