670391542 has 4 divisors (see below), whose sum is σ = 1005587316. Its totient is φ = 335195770.

The previous prime is 670391539. The next prime is 670391569. The reversal of 670391542 is 245193076.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167597884 + ... + 167597887.

It is an arithmetic number, because the mean of its divisors is an integer number (251396829).

Almost surely, 2^670391542 is an apocalyptic number.

670391542 is a deficient number, since it is larger than the sum of its proper divisors (335195774).

670391542 is a wasteful number, since it uses less digits than its factorization.

670391542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335195773.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 670391542 is about 25891.9204000012. The cubic root of 670391542 is about 875.2044331037.

The spelling of 670391542 in words is "six hundred seventy million, three hundred ninety-one thousand, five hundred forty-two".