1497145791 has 8 divisors (see below), whose sum is σ = 2044882224. Its totient is φ = 973753280.

The previous prime is 1497145777. The next prime is 1497145813. The reversal of 1497145791 is 1975417941.

It is a happy number.

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

It is not a de Polignac number, because 1497145791 - 2²² = 1492951487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1497145791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1497145711) 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, 6085836 + ... + 6086081.

It is an arithmetic number, because the mean of its divisors is an integer number (255610278).

Almost surely, 2^1497145791 is an apocalyptic number.

1497145791 is a deficient number, since it is larger than the sum of its proper divisors (547736433).

1497145791 is a wasteful number, since it uses less digits than its factorization.

1497145791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12171961.

The product of its digits is 317520, while the sum is 48.

The square root of 1497145791 is about 38692.9682371358. The cubic root of 1497145791 is about 1143.9877251747.

The spelling of 1497145791 in words is "one billion, four hundred ninety-seven million, one hundred forty-five thousand, seven hundred ninety-one".