690911492 has 6 divisors (see below), whose sum is σ = 1209095118. Its totient is φ = 345455744.

The previous prime is 690911491. The next prime is 690911527. The reversal of 690911492 is 294119096.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 687278656 + 3632836 = 26216^2 + 1906^2 .

It is not an unprimeable number, because it can be changed into a prime (690911491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86363933 + ... + 86363940.

It is an arithmetic number, because the mean of its divisors is an integer number (201515853).

Almost surely, 2^690911492 is an apocalyptic number.

It is an amenable number.

690911492 is a deficient number, since it is larger than the sum of its proper divisors (518183626).

690911492 is a wasteful number, since it uses less digits than its factorization.

690911492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172727877 (or 172727875 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 690911492 is about 26285.1953007772. The cubic root of 690911492 is about 884.0445248964.

The spelling of 690911492 in words is "six hundred ninety million, nine hundred eleven thousand, four hundred ninety-two".