154191157 has 2 divisors, whose sum is σ = 154191158. Its totient is φ = 154191156.

The previous prime is 154191109. The next prime is 154191181. The reversal of 154191157 is 751191451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143784081 + 10407076 = 11991^2 + 3226^2 .

It is an emirp because it is prime and its reverse (751191451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154191157 - 2²³ = 145802549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154191757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77095578 + 77095579.

It is an arithmetic number, because the mean of its divisors is an integer number (77095579).

Almost surely, 2^154191157 is an apocalyptic number.

It is an amenable number.

154191157 is a deficient number, since it is larger than the sum of its proper divisors (1).

154191157 is an equidigital number, since it uses as much as digits as its factorization.

154191157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 34.

The square root of 154191157 is about 12417.3731924268. The cubic root of 154191157 is about 536.2325291026.

The spelling of 154191157 in words is "one hundred fifty-four million, one hundred ninety-one thousand, one hundred fifty-seven".