1371709491 has 8 divisors (see below), whose sum is σ = 1830119424. Its totient is φ = 913886280.

The previous prime is 1371709453. The next prime is 1371709499. The reversal of 1371709491 is 1949071731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1371709491 - 2⁷ = 1371709363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1371709499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141195 + ... + 150596.

It is an arithmetic number, because the mean of its divisors is an integer number (228764928).

Almost surely, 2^1371709491 is an apocalyptic number.

1371709491 is a deficient number, since it is larger than the sum of its proper divisors (458409933).

1371709491 is a wasteful number, since it uses less digits than its factorization.

1371709491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293361.

The product of its (nonzero) digits is 47628, while the sum is 42.

The square root of 1371709491 is about 37036.5966444003. The cubic root of 1371709491 is about 1111.1023032409.

The spelling of 1371709491 in words is "one billion, three hundred seventy-one million, seven hundred nine thousand, four hundred ninety-one".