690406534 has 16 divisors (see below), whose sum is σ = 1091084400. Its totient is φ = 326744064.

The previous prime is 690406531. The next prime is 690406573. The reversal of 690406534 is 435604096.

It is a happy number.

It is a super-2 number, since 2×690406534² = 953322364379786312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 690406493 and 690406502.

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 7 ways as a sum of consecutive naturals, for example, 38782 + ... + 53710.

It is an arithmetic number, because the mean of its divisors is an integer number (68192775).

Almost surely, 2^690406534 is an apocalyptic number.

690406534 is a deficient number, since it is larger than the sum of its proper divisors (400677866).

690406534 is a wasteful number, since it uses less digits than its factorization.

690406534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16167.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 690406534 is about 26275.5881760999. The cubic root of 690406534 is about 883.8291021505.

The spelling of 690406534 in words is "six hundred ninety million, four hundred six thousand, five hundred thirty-four".