1299013491 has 24 divisors (see below), whose sum is σ = 1806846912. Its totient is φ = 830043600.

The previous prime is 1299013433. The next prime is 1299013567. The reversal of 1299013491 is 1943109921.

It is not a de Polignac number, because 1299013491 - 2⁷ = 1299013363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299013421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 306376 + ... + 310586.

It is an arithmetic number, because the mean of its divisors is an integer number (75285288).

Almost surely, 2^1299013491 is an apocalyptic number.

1299013491 is a deficient number, since it is larger than the sum of its proper divisors (507833421).

1299013491 is a wasteful number, since it uses less digits than its factorization.

1299013491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4383 (or 4352 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1299013491 is about 36041.8297399008. The cubic root of 1299013491 is about 1091.1167442506.

The spelling of 1299013491 in words is "one billion, two hundred ninety-nine million, thirteen thousand, four hundred ninety-one".