1379501971 has 2 divisors, whose sum is σ = 1379501972. Its totient is φ = 1379501970.

The previous prime is 1379501947. The next prime is 1379501983. The reversal of 1379501971 is 1791059731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1379501971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1379501171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689750985 + 689750986.

It is an arithmetic number, because the mean of its divisors is an integer number (689750986).

Almost surely, 2^1379501971 is an apocalyptic number.

1379501971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379501971 is an equidigital number, since it uses as much as digits as its factorization.

1379501971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59535, while the sum is 43.

The square root of 1379501971 is about 37141.6473921123. The cubic root of 1379501971 is about 1113.2023345476.

The spelling of 1379501971 in words is "one billion, three hundred seventy-nine million, five hundred one thousand, nine hundred seventy-one".