1350077991 has 4 divisors (see below), whose sum is σ = 1800103992. Its totient is φ = 900051992.

The previous prime is 1350077951. The next prime is 1350077999. The reversal of 1350077991 is 1997700531.

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 1350077991 - 2¹⁰ = 1350076967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1350077999) 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, 225012996 + ... + 225013001.

It is an arithmetic number, because the mean of its divisors is an integer number (450025998).

Almost surely, 2^1350077991 is an apocalyptic number.

1350077991 is a deficient number, since it is larger than the sum of its proper divisors (450026001).

1350077991 is an equidigital number, since it uses as much as digits as its factorization.

1350077991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450026000.

The product of its (nonzero) digits is 59535, while the sum is 42.

The square root of 1350077991 is about 36743.4074495004. The cubic root of 1350077991 is about 1105.2307322416.

The spelling of 1350077991 in words is "one billion, three hundred fifty million, seventy-seven thousand, nine hundred ninety-one".