730000157 has 4 divisors (see below), whose sum is σ = 730179840. Its totient is φ = 729820476.

The previous prime is 730000153. The next prime is 730000171. The reversal of 730000157 is 751000037.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751000037 = 29 ⋅25896553.

It is a cyclic number.

It is not a de Polignac number, because 730000157 - 2² = 730000153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730000153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83603 + ... + 91920.

It is an arithmetic number, because the mean of its divisors is an integer number (182544960).

Almost surely, 2^730000157 is an apocalyptic number.

It is an amenable number.

730000157 is a deficient number, since it is larger than the sum of its proper divisors (179683).

730000157 is a wasteful number, since it uses less digits than its factorization.

730000157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179682.

The product of its (nonzero) digits is 735, while the sum is 23.

The square root of 730000157 is about 27018.5150776278. The cubic root of 730000157 is about 900.4113991594.

The spelling of 730000157 in words is "seven hundred thirty million, one hundred fifty-seven", and thus it is an aban number.