690061671 has 24 divisors (see below), whose sum is σ = 1136575440. Its totient is φ = 399672576.

The previous prime is 690061667. The next prime is 690061679. The reversal of 690061671 is 176160096.

It is not a de Polignac number, because 690061671 - 2² = 690061667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690061679) 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, 171481 + ... + 175458.

It is an arithmetic number, because the mean of its divisors is an integer number (47357310).

Almost surely, 2^690061671 is an apocalyptic number.

690061671 is a deficient number, since it is larger than the sum of its proper divisors (446513769).

690061671 is a wasteful number, since it uses less digits than its factorization.

690061671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346975 (or 346972 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 690061671 is about 26269.0249343214. The cubic root of 690061671 is about 883.6819179894.

The spelling of 690061671 in words is "six hundred ninety million, sixty-one thousand, six hundred seventy-one".