615349897 has 4 divisors (see below), whose sum is σ = 628442496. Its totient is φ = 602257300.

The previous prime is 615349759. The next prime is 615349921. The reversal of 615349897 is 798943516.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 615349897 - 2¹¹ = 615347849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615649897) 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, 6546229 + ... + 6546322.

It is an arithmetic number, because the mean of its divisors is an integer number (157110624).

Almost surely, 2^615349897 is an apocalyptic number.

It is an amenable number.

615349897 is a deficient number, since it is larger than the sum of its proper divisors (13092599).

615349897 is a wasteful number, since it uses less digits than its factorization.

615349897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13092598.

The product of its digits is 1632960, while the sum is 52.

The square root of 615349897 is about 24806.2471365582. The cubic root of 615349897 is about 850.5647444210.

The spelling of 615349897 in words is "six hundred fifteen million, three hundred forty-nine thousand, eight hundred ninety-seven".