1145779213 has 2 divisors, whose sum is σ = 1145779214. Its totient is φ = 1145779212.

The previous prime is 1145779177. The next prime is 1145779223. The reversal of 1145779213 is 3129775411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1070402089 + 75377124 = 32717^2 + 8682^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145779213 - 2⁹ = 1145778701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145779223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572889606 + 572889607.

It is an arithmetic number, because the mean of its divisors is an integer number (572889607).

Almost surely, 2^1145779213 is an apocalyptic number.

It is an amenable number.

1145779213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145779213 is an equidigital number, since it uses as much as digits as its factorization.

1145779213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 40.

The square root of 1145779213 is about 33849.3605995741. The cubic root of 1145779213 is about 1046.4062211301.

The spelling of 1145779213 in words is "one billion, one hundred forty-five million, seven hundred seventy-nine thousand, two hundred thirteen".