1330400291 has 4 divisors (see below), whose sum is σ = 1451345784. Its totient is φ = 1209454800.

The previous prime is 1330400261. The next prime is 1330400303. The reversal of 1330400291 is 1920040331.

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-1330400291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1330400261) 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, 60472730 + ... + 60472751.

It is an arithmetic number, because the mean of its divisors is an integer number (362836446).

Almost surely, 2^1330400291 is an apocalyptic number.

1330400291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1330400291 is a deficient number, since it is larger than the sum of its proper divisors (120945493).

1330400291 is a wasteful number, since it uses less digits than its factorization.

1330400291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120945492.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1330400291 is about 36474.6527193886. The cubic root of 1330400291 is about 1099.8347660901.

The spelling of 1330400291 in words is "one billion, three hundred thirty million, four hundred thousand, two hundred ninety-one".