1690749954 has 24 divisors (see below), whose sum is σ = 3682478592. Its totient is φ = 560631480.

The previous prime is 1690749953. The next prime is 1690749959. The reversal of 1690749954 is 4599470961.

It is a happy number.

1690749954 is a `hidden beast` number, since 16 + 90 + 7 + 499 + 54 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1690749954.

It is not an unprimeable number, because it can be changed into a prime (1690749953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242454 + ... + 249329.

It is an arithmetic number, because the mean of its divisors is an integer number (153436608).

Almost surely, 2^1690749954 is an apocalyptic number.

1690749954 is an abundant number, since it is smaller than the sum of its proper divisors (1991728638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1690749954 is a wasteful number, since it uses less digits than its factorization.

1690749954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491982 (or 491979 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 1690749954 is about 41118.7299657954. The cubic root of 1690749954 is about 1191.3145922423.

The spelling of 1690749954 in words is "one billion, six hundred ninety million, seven hundred forty-nine thousand, nine hundred fifty-four".