1492705897 has 4 divisors (see below), whose sum is σ = 1492783236. Its totient is φ = 1492628560.

The previous prime is 1492705891. The next prime is 1492705933. The reversal of 1492705897 is 7985072941.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1369296016 + 123409881 = 37004^2 + 11109^2 .

It is a cyclic number.

It is not a de Polignac number, because 1492705897 - 2³ = 1492705889 is a prime.

It is a super-3 number, since 3×1492705897³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1492705891) 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, 16923 + ... + 57199.

It is an arithmetic number, because the mean of its divisors is an integer number (373195809).

Almost surely, 2^1492705897 is an apocalyptic number.

It is an amenable number.

1492705897 is a deficient number, since it is larger than the sum of its proper divisors (77339).

1492705897 is an equidigital number, since it uses as much as digits as its factorization.

1492705897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77338.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The square root of 1492705897 is about 38635.5522414265. The cubic root of 1492705897 is about 1142.8557460333.

The spelling of 1492705897 in words is "one billion, four hundred ninety-two million, seven hundred five thousand, eight hundred ninety-seven".