157121663 has 2 divisors, whose sum is σ = 157121664. Its totient is φ = 157121662.

The previous prime is 157121639. The next prime is 157121677. The reversal of 157121663 is 366121751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157121663 - 2¹² = 157117567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157121603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78560831 + 78560832.

It is an arithmetic number, because the mean of its divisors is an integer number (78560832).

Almost surely, 2^157121663 is an apocalyptic number.

157121663 is a deficient number, since it is larger than the sum of its proper divisors (1).

157121663 is an equidigital number, since it uses as much as digits as its factorization.

157121663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 157121663 is about 12534.8180281965. The cubic root of 157121663 is about 539.6083843304.

The spelling of 157121663 in words is "one hundred fifty-seven million, one hundred twenty-one thousand, six hundred sixty-three".