157400729 has 2 divisors, whose sum is σ = 157400730. Its totient is φ = 157400728.

The previous prime is 157400717. The next prime is 157400741. The reversal of 157400729 is 927004751.

It is a balanced prime because it is at equal distance from previous prime (157400717) and next prime (157400741).

It can be written as a sum of positive squares in only one way, i.e., 154753600 + 2647129 = 12440^2 + 1627^2 .

It is an emirp because it is prime and its reverse (927004751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157400729 - 2⁸ = 157400473 is a prime.

It is not a weakly prime, because it can be changed into another prime (157400779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78700364 + 78700365.

It is an arithmetic number, because the mean of its divisors is an integer number (78700365).

Almost surely, 2^157400729 is an apocalyptic number.

It is an amenable number.

157400729 is a deficient number, since it is larger than the sum of its proper divisors (1).

157400729 is an equidigital number, since it uses as much as digits as its factorization.

157400729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 157400729 is about 12545.9447232960. The cubic root of 157400729 is about 539.9276640646.

The spelling of 157400729 in words is "one hundred fifty-seven million, four hundred thousand, seven hundred twenty-nine".