1966148731 has 2 divisors, whose sum is σ = 1966148732. Its totient is φ = 1966148730.

The previous prime is 1966148713. The next prime is 1966148741. The reversal of 1966148731 is 1378416691.

1966148731 = T₃₆₂₀₃ + T₃₆₂₀₄ + T₃₆₂₀₅.

Together with previous prime (1966148713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1378416691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1966148731 - 2²⁵ = 1932594299 is a prime.

It is a super-2 number, since 2×1966148731² = 7731481664825820722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1966148711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983074365 + 983074366.

It is an arithmetic number, because the mean of its divisors is an integer number (983074366).

Almost surely, 2^1966148731 is an apocalyptic number.

1966148731 is the 36205-th centered triangular number.

1966148731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966148731 is an equidigital number, since it uses as much as digits as its factorization.

1966148731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 1966148731 is about 44341.2757033444. The cubic root of 1966148731 is about 1252.7722431359.

The spelling of 1966148731 in words is "one billion, nine hundred sixty-six million, one hundred forty-eight thousand, seven hundred thirty-one".