1972140239 has 2 divisors, whose sum is σ = 1972140240. Its totient is φ = 1972140238.

The previous prime is 1972140211. The next prime is 1972140251. The reversal of 1972140239 is 9320412791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1972140239 - 2²⁴ = 1955363023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972140259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986070119 + 986070120.

It is an arithmetic number, because the mean of its divisors is an integer number (986070120).

Almost surely, 2^1972140239 is an apocalyptic number.

1972140239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972140239 is an equidigital number, since it uses as much as digits as its factorization.

1972140239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 1972140239 is about 44408.7856060037. The cubic root of 1972140239 is about 1254.0434903650.

The spelling of 1972140239 in words is "one billion, nine hundred seventy-two million, one hundred forty thousand, two hundred thirty-nine".