124649399 has 4 divisors (see below), whose sum is σ = 142456464. Its totient is φ = 106842336.

The previous prime is 124649363. The next prime is 124649401. The reversal of 124649399 is 993946421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124649399 is a prime.

It is a super-2 number, since 2×124649399² = 31074945342122402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124649309) 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, 8903522 + ... + 8903535.

It is an arithmetic number, because the mean of its divisors is an integer number (35614116).

Almost surely, 2^124649399 is an apocalyptic number.

124649399 is a deficient number, since it is larger than the sum of its proper divisors (17807065).

124649399 is an equidigital number, since it uses as much as digits as its factorization.

124649399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17807064.

The product of its digits is 419904, while the sum is 47.

The square root of 124649399 is about 11164.6495242797. The cubic root of 124649399 is about 499.5320942650.

The spelling of 124649399 in words is "one hundred twenty-four million, six hundred forty-nine thousand, three hundred ninety-nine".