801198157 has 2 divisors, whose sum is σ = 801198158. Its totient is φ = 801198156.

The previous prime is 801198113. The next prime is 801198197. The reversal of 801198157 is 751891108.

It is an a-pointer prime, because the next prime (801198197) can be obtained adding 801198157 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777907881 + 23290276 = 27891^2 + 4826^2 .

It is a cyclic number.

It is not a de Polignac number, because 801198157 - 2⁷ = 801198029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801198107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400599078 + 400599079.

It is an arithmetic number, because the mean of its divisors is an integer number (400599079).

Almost surely, 2^801198157 is an apocalyptic number.

It is an amenable number.

801198157 is a deficient number, since it is larger than the sum of its proper divisors (1).

801198157 is an equidigital number, since it uses as much as digits as its factorization.

801198157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 40.

The square root of 801198157 is about 28305.4439463507. The cubic root of 801198157 is about 928.7809815604.

The spelling of 801198157 in words is "eight hundred one million, one hundred ninety-eight thousand, one hundred fifty-seven".