1351986946 has 4 divisors (see below), whose sum is σ = 2027980422. Its totient is φ = 675993472.

The previous prime is 1351986929. The next prime is 1351987057. The reversal of 1351986946 is 6496891531.

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., 1187147025 + 164839921 = 34455^2 + 12839^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1351986893 and 1351986902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337996735 + ... + 337996738.

Almost surely, 2^1351986946 is an apocalyptic number.

1351986946 is a deficient number, since it is larger than the sum of its proper divisors (675993476).

1351986946 is an equidigital number, since it uses as much as digits as its factorization.

1351986946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675993475.

The product of its digits is 1399680, while the sum is 52.

The square root of 1351986946 is about 36769.3751102735. The cubic root of 1351986946 is about 1105.7514039163.

The spelling of 1351986946 in words is "one billion, three hundred fifty-one million, nine hundred eighty-six thousand, nine hundred forty-six".