1145177399 has 4 divisors (see below), whose sum is σ = 1148790264. Its totient is φ = 1141564536.

The previous prime is 1145177377. The next prime is 1145177447. The reversal of 1145177399 is 9937715411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145177399 is a prime.

It is a super-2 number, since 2×1145177399² = 2622862550360810402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145177359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805957 + ... + 1806590.

It is an arithmetic number, because the mean of its divisors is an integer number (287197566).

Almost surely, 2^1145177399 is an apocalyptic number.

1145177399 is a deficient number, since it is larger than the sum of its proper divisors (3612865).

1145177399 is an equidigital number, since it uses as much as digits as its factorization.

1145177399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612864.

The product of its digits is 238140, while the sum is 47.

The square root of 1145177399 is about 33840.4698401189. The cubic root of 1145177399 is about 1046.2229827439. Note that the first 3 decimals are identical.

The spelling of 1145177399 in words is "one billion, one hundred forty-five million, one hundred seventy-seven thousand, three hundred ninety-nine".