690137902 has 16 divisors (see below), whose sum is σ = 1043928000. Its totient is φ = 342170080.

The previous prime is 690137897. The next prime is 690137941. The reversal of 690137902 is 209731096.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212652 + ... + 215872.

It is an arithmetic number, because the mean of its divisors is an integer number (65245500).

Almost surely, 2^690137902 is an apocalyptic number.

690137902 is a deficient number, since it is larger than the sum of its proper divisors (353790098).

690137902 is a wasteful number, since it uses less digits than its factorization.

690137902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 690137902 is about 26270.4758616969. The cubic root of 690137902 is about 883.7144568569.

Adding to 690137902 its reverse (209731096), we get a palindrome (899868998).

The spelling of 690137902 in words is "six hundred ninety million, one hundred thirty-seven thousand, nine hundred two".