137402723 has 4 divisors (see below), whose sum is σ = 138763248. Its totient is φ = 136042200.

The previous prime is 137402669. The next prime is 137402777. The reversal of 137402723 is 327204731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327204731 = 7 ⋅46743533.

It is an interprime number because it is at equal distance from previous prime (137402669) and next prime (137402777).

It is a cyclic number.

It is not a de Polignac number, because 137402723 - 2⁸ = 137402467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137408723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680111 + ... + 680312.

It is an arithmetic number, because the mean of its divisors is an integer number (34690812).

Almost surely, 2^137402723 is an apocalyptic number.

137402723 is a deficient number, since it is larger than the sum of its proper divisors (1360525).

137402723 is a wasteful number, since it uses less digits than its factorization.

137402723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360524.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 137402723 is about 11721.8907604533. The cubic root of 137402723 is about 516.0183113006.

The spelling of 137402723 in words is "one hundred thirty-seven million, four hundred two thousand, seven hundred twenty-three".