102972649 has 16 divisors (see below), whose sum is σ = 116363520. Its totient is φ = 90457920.

The previous prime is 102972643. The next prime is 102972673. The reversal of 102972649 is 946279201.

It is a cyclic number.

It is not a de Polignac number, because 102972649 - 2⁷ = 102972521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102972643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24844 + ... + 28690.

It is an arithmetic number, because the mean of its divisors is an integer number (7272720).

Almost surely, 2^102972649 is an apocalyptic number.

It is an amenable number.

102972649 is a deficient number, since it is larger than the sum of its proper divisors (13390871).

102972649 is a wasteful number, since it uses less digits than its factorization.

102972649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 102972649 is about 10147.5439885718. The cubic root of 102972649 is about 468.7133194646.

The spelling of 102972649 in words is "one hundred two million, nine hundred seventy-two thousand, six hundred forty-nine".