690255946 has 4 divisors (see below), whose sum is σ = 1035383922. Its totient is φ = 345127972.

The previous prime is 690255911. The next prime is 690255983. The reversal of 690255946 is 649552096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 636805225 + 53450721 = 25235^2 + 7311^2 .

It is a junction number, because it is equal to n+sod(n) for n = 690255896 and 690255905.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172563985 + ... + 172563988.

Almost surely, 2^690255946 is an apocalyptic number.

690255946 is a deficient number, since it is larger than the sum of its proper divisors (345127976).

690255946 is a wasteful number, since it uses less digits than its factorization.

690255946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345127975.

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 690255946 is about 26272.7224702732. The cubic root of 690255946 is about 883.7648386922.

The spelling of 690255946 in words is "six hundred ninety million, two hundred fifty-five thousand, nine hundred forty-six".