1379226091 has 2 divisors, whose sum is σ = 1379226092. Its totient is φ = 1379226090.

The previous prime is 1379226059. The next prime is 1379226137. The reversal of 1379226091 is 1906229731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1379226091 - 2⁵ = 1379226059 is a prime.

It is a super-2 number, since 2×1379226091² = 3804529220190280562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1379220091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689613045 + 689613046.

It is an arithmetic number, because the mean of its divisors is an integer number (689613046).

Almost surely, 2^1379226091 is an apocalyptic number.

1379226091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379226091 is an equidigital number, since it uses as much as digits as its factorization.

1379226091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 1379226091 is about 37137.9333162200. The cubic root of 1379226091 is about 1113.1281215970.

The spelling of 1379226091 in words is "one billion, three hundred seventy-nine million, two hundred twenty-six thousand, ninety-one".