790157 has 4 divisors (see below), whose sum is σ = 792060. Its totient is φ = 788256.

The previous prime is 790121. The next prime is 790169. The reversal of 790157 is 751097.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751097 = 73 ⋅10289.

It can be written as a sum of positive squares in 2 ways, for example, as 244036 + 546121 = 494^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 790157 - 2⁶ = 790093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (790057) 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, 32 + ... + 1257.

It is an arithmetic number, because the mean of its divisors is an integer number (198015).

2⁷⁹⁰¹⁵⁷ is an apocalyptic number.

It is an amenable number.

790157 is a deficient number, since it is larger than the sum of its proper divisors (1903).

790157 is a wasteful number, since it uses less digits than its factorization.

790157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902.

The product of its (nonzero) digits is 2205, while the sum is 29.

The square root of 790157 is about 888.9077567442. The cubic root of 790157 is about 92.4494781328.

Subtracting from 790157 its reverse (751097), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 790157 in words is "seven hundred ninety thousand, one hundred fifty-seven".