690671542 has 16 divisors (see below), whose sum is σ = 1145674512. Its totient is φ = 309640320.

The previous prime is 690671491. The next prime is 690671543. The reversal of 690671542 is 245176096.

It is a junction number, because it is equal to n+sod(n) for n = 690671495 and 690671504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690671543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213423 + ... + 216634.

It is an arithmetic number, because the mean of its divisors is an integer number (71604657).

Almost surely, 2^690671542 is an apocalyptic number.

690671542 is a deficient number, since it is larger than the sum of its proper divisors (455002970).

690671542 is a wasteful number, since it uses less digits than its factorization.

690671542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430143.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 690671542 is about 26280.6305479910. The cubic root of 690671542 is about 883.9421716777.

The spelling of 690671542 in words is "six hundred ninety million, six hundred seventy-one thousand, five hundred forty-two".