137764821 has 8 divisors (see below), whose sum is σ = 194491584. Its totient is φ = 86440640.

The previous prime is 137764799. The next prime is 137764843. The reversal of 137764821 is 128467731.

It is an interprime number because it is at equal distance from previous prime (137764799) and next prime (137764843).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137764821 - 2⁵ = 137764789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137764821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137764721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1350585 + ... + 1350686.

It is an arithmetic number, because the mean of its divisors is an integer number (24311448).

Almost surely, 2^137764821 is an apocalyptic number.

It is an amenable number.

137764821 is a deficient number, since it is larger than the sum of its proper divisors (56726763).

137764821 is a wasteful number, since it uses less digits than its factorization.

137764821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701291.

The product of its digits is 56448, while the sum is 39.

The square root of 137764821 is about 11737.3259731508. The cubic root of 137764821 is about 516.4712021396.

The spelling of 137764821 in words is "one hundred thirty-seven million, seven hundred sixty-four thousand, eight hundred twenty-one".