1972105427 has 2 divisors, whose sum is σ = 1972105428. Its totient is φ = 1972105426.

The previous prime is 1972105423. The next prime is 1972105463. The reversal of 1972105427 is 7245012791.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1972105427 - 2² = 1972105423 is a prime.

It is not a weakly prime, because it can be changed into another prime (1972105423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986052713 + 986052714.

It is an arithmetic number, because the mean of its divisors is an integer number (986052714).

Almost surely, 2^1972105427 is an apocalyptic number.

1972105427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972105427 is an equidigital number, since it uses as much as digits as its factorization.

1972105427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 1972105427 is about 44408.3936548036. The cubic root of 1972105427 is about 1254.0361115762.

The spelling of 1972105427 in words is "one billion, nine hundred seventy-two million, one hundred five thousand, four hundred twenty-seven".