1264222679 has 2 divisors, whose sum is σ = 1264222680. Its totient is φ = 1264222678.

The previous prime is 1264222649. The next prime is 1264222699. The reversal of 1264222679 is 9762224621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264222679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264222639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632111339 + 632111340.

It is an arithmetic number, because the mean of its divisors is an integer number (632111340).

Almost surely, 2^1264222679 is an apocalyptic number.

1264222679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264222679 is an equidigital number, since it uses as much as digits as its factorization.

1264222679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 1264222679 is about 35555.9091994566. The cubic root of 1264222679 is about 1081.2875245355.

The spelling of 1264222679 in words is "one billion, two hundred sixty-four million, two hundred twenty-two thousand, six hundred seventy-nine".