1601381767 has 2 divisors, whose sum is σ = 1601381768. Its totient is φ = 1601381766.

The previous prime is 1601381737. The next prime is 1601381773. The reversal of 1601381767 is 7671831061.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601381767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601381707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800690883 + 800690884.

It is an arithmetic number, because the mean of its divisors is an integer number (800690884).

Almost surely, 2^1601381767 is an apocalyptic number.

1601381767 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601381767 is an equidigital number, since it uses as much as digits as its factorization.

1601381767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 1601381767 is about 40017.2683600468. The cubic root of 1601381767 is about 1169.9436910101.

The spelling of 1601381767 in words is "one billion, six hundred one million, three hundred eighty-one thousand, seven hundred sixty-seven".