155457793 has 4 divisors (see below), whose sum is σ = 155548228. Its totient is φ = 155367360.

The previous prime is 155457769. The next prime is 155457803. The reversal of 155457793 is 397754551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1896129 + 153561664 = 1377^2 + 12392^2 .

It is a cyclic number.

It is not a de Polignac number, because 155457793 - 2⁵ = 155457761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155457703) 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, 42588 + ... + 46093.

It is an arithmetic number, because the mean of its divisors is an integer number (38887057).

Almost surely, 2^155457793 is an apocalyptic number.

It is an amenable number.

155457793 is a deficient number, since it is larger than the sum of its proper divisors (90435).

155457793 is an equidigital number, since it uses as much as digits as its factorization.

155457793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90434.

The product of its digits is 661500, while the sum is 46.

The square root of 155457793 is about 12468.2714519696. The cubic root of 155457793 is about 537.6968587014.

The spelling of 155457793 in words is "one hundred fifty-five million, four hundred fifty-seven thousand, seven hundred ninety-three".