102137649 has 32 divisors (see below), whose sum is σ = 149713920. Its totient is φ = 61673472.

The previous prime is 102137639. The next prime is 102137657. The reversal of 102137649 is 946731201.

It is not a de Polignac number, because 102137649 - 2⁹ = 102137137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102137639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212992 + ... + 213470.

It is an arithmetic number, because the mean of its divisors is an integer number (4678560).

Almost surely, 2^102137649 is an apocalyptic number.

It is an amenable number.

102137649 is a deficient number, since it is larger than the sum of its proper divisors (47576271).

102137649 is a wasteful number, since it uses less digits than its factorization.

102137649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 102137649 is about 10106.3172817797. The cubic root of 102137649 is about 467.4429552824.

The spelling of 102137649 in words is "one hundred two million, one hundred thirty-seven thousand, six hundred forty-nine".