1671631274 has 4 divisors (see below), whose sum is σ = 2507446914. Its totient is φ = 835815636.

The previous prime is 1671631249. The next prime is 1671631387. The reversal of 1671631274 is 4721361761.

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

It can be written as a sum of positive squares in only one way, i.e., 1356817225 + 314814049 = 36835^2 + 17743^2 .

It is a super-2 number, since 2×1671631274² = 5588702232429726152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417907817 + ... + 417907820.

Almost surely, 2^1671631274 is an apocalyptic number.

1671631274 is a deficient number, since it is larger than the sum of its proper divisors (835815640).

1671631274 is an equidigital number, since it uses as much as digits as its factorization.

1671631274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835815639.

The product of its digits is 42336, while the sum is 38.

The square root of 1671631274 is about 40885.5876073709. The cubic root of 1671631274 is about 1186.8071730940.

The spelling of 1671631274 in words is "one billion, six hundred seventy-one million, six hundred thirty-one thousand, two hundred seventy-four".