690406533 has 24 divisors (see below), whose sum is σ = 1068657408. Its totient is φ = 427969152.

The previous prime is 690406531. The next prime is 690406573. The reversal of 690406533 is 335604096.

It is not a de Polignac number, because 690406533 - 2¹ = 690406531 is a prime.

It is a super-2 number, since 2×690406533² = 953322361618160178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690406531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14485 + ... + 39882.

It is an arithmetic number, because the mean of its divisors is an integer number (44527392).

Almost surely, 2^690406533 is an apocalyptic number.

It is an amenable number.

690406533 is a deficient number, since it is larger than the sum of its proper divisors (378250875).

690406533 is a wasteful number, since it uses less digits than its factorization.

690406533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54473 (or 54470 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 690406533 is about 26275.5881570708. The cubic root of 690406533 is about 883.8291017238.

The spelling of 690406533 in words is "six hundred ninety million, four hundred six thousand, five hundred thirty-three".