1951349779 has 2 divisors, whose sum is σ = 1951349780. Its totient is φ = 1951349778.

The previous prime is 1951349747. The next prime is 1951349783. The reversal of 1951349779 is 9779431591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1951349779 - 2⁵ = 1951349747 is a prime.

It is not a weakly prime, because it can be changed into another prime (1951349789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975674889 + 975674890.

It is an arithmetic number, because the mean of its divisors is an integer number (975674890).

Almost surely, 2^1951349779 is an apocalyptic number.

1951349779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951349779 is an equidigital number, since it uses as much as digits as its factorization.

1951349779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2143260, while the sum is 55.

The square root of 1951349779 is about 44174.0849254402. The cubic root of 1951349779 is about 1249.6211713894.

The spelling of 1951349779 in words is "one billion, nine hundred fifty-one million, three hundred forty-nine thousand, seven hundred seventy-nine".