1138249495 has 4 divisors (see below), whose sum is σ = 1365899400. Its totient is φ = 910599592.

The previous prime is 1138249487. The next prime is 1138249499. The reversal of 1138249495 is 5949428311.

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

It is a cyclic number.

It is not a de Polignac number, because 1138249495 - 2³ = 1138249487 is a prime.

It is a super-2 number, since 2×1138249495² = 2591223825735510050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138249499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113824945 + ... + 113824954.

It is an arithmetic number, because the mean of its divisors is an integer number (341474850).

Almost surely, 2^1138249495 is an apocalyptic number.

1138249495 is a deficient number, since it is larger than the sum of its proper divisors (227649905).

1138249495 is an equidigital number, since it uses as much as digits as its factorization.

1138249495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227649904.

The product of its digits is 311040, while the sum is 46.

The square root of 1138249495 is about 33737.9533315226. The cubic root of 1138249495 is about 1044.1089586348.

The spelling of 1138249495 in words is "one billion, one hundred thirty-eight million, two hundred forty-nine thousand, four hundred ninety-five".