690537607 has 2 divisors, whose sum is σ = 690537608. Its totient is φ = 690537606.

The previous prime is 690537553. The next prime is 690537613. The reversal of 690537607 is 706735096.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690537607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690537667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345268803 + 345268804.

It is an arithmetic number, because the mean of its divisors is an integer number (345268804).

Almost surely, 2^690537607 is an apocalyptic number.

690537607 is a deficient number, since it is larger than the sum of its proper divisors (1).

690537607 is an equidigital number, since it uses as much as digits as its factorization.

690537607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 690537607 is about 26278.0822549896. The cubic root of 690537607 is about 883.8850299727.

The spelling of 690537607 in words is "six hundred ninety million, five hundred thirty-seven thousand, six hundred seven".