7431423157 has 2 divisors, whose sum is σ = 7431423158. Its totient is φ = 7431423156.

The previous prime is 7431423079. The next prime is 7431423179. The reversal of 7431423157 is 7513241347.

7431423157 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7156990801 + 274432356 = 84599^2 + 16566^2 .

It is an emirp because it is prime and its reverse (7513241347) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7431423157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7431423187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3715711578 + 3715711579.

It is an arithmetic number, because the mean of its divisors is an integer number (3715711579).

Almost surely, 2^7431423157 is an apocalyptic number.

It is an amenable number.

7431423157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7431423157 is an equidigital number, since it uses as much as digits as its factorization.

7431423157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 37.

The square root of 7431423157 is about 86205.7025781937. The cubic root of 7431423157 is about 1951.4495605333.

The spelling of 7431423157 in words is "seven billion, four hundred thirty-one million, four hundred twenty-three thousand, one hundred fifty-seven".