690533533 has 2 divisors, whose sum is σ = 690533534. Its totient is φ = 690533532.

The previous prime is 690533483. The next prime is 690533539. The reversal of 690533533 is 335335096.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 689692644 + 840889 = 26262^2 + 917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690533533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690533492 and 690533501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690533539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345266766 + 345266767.

It is an arithmetic number, because the mean of its divisors is an integer number (345266767).

Almost surely, 2^690533533 is an apocalyptic number.

It is an amenable number.

690533533 is a deficient number, since it is larger than the sum of its proper divisors (1).

690533533 is an equidigital number, since it uses as much as digits as its factorization.

690533533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109350, while the sum is 37.

The square root of 690533533 is about 26278.0047378031. The cubic root of 690533533 is about 883.8832917354.

The spelling of 690533533 in words is "six hundred ninety million, five hundred thirty-three thousand, five hundred thirty-three".