1373511961 has 2 divisors, whose sum is σ = 1373511962. Its totient is φ = 1373511960.

The previous prime is 1373511941. The next prime is 1373511989. The reversal of 1373511961 is 1691153731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999824400 + 373687561 = 31620^2 + 19331^2 .

It is an emirp because it is prime and its reverse (1691153731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1373511961 - 2⁹ = 1373511449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1373511961.

It is not a weakly prime, because it can be changed into another prime (1373511941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686755980 + 686755981.

It is an arithmetic number, because the mean of its divisors is an integer number (686755981).

Almost surely, 2^1373511961 is an apocalyptic number.

It is an amenable number.

1373511961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373511961 is an equidigital number, since it uses as much as digits as its factorization.

1373511961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 37.

The square root of 1373511961 is about 37060.9222901967. The cubic root of 1373511961 is about 1111.5887648435.

The spelling of 1373511961 in words is "one billion, three hundred seventy-three million, five hundred eleven thousand, nine hundred sixty-one".